I think you are just experiencing a sore throat. Cut yourself, and him some slack. I think its an awesome idea your both getting tested
When you are feeling anxious, to help you calm down breathe in deeply through your nose slowly and out slowly through your mouth slowly. Do this a few times.
Although it is possible to get STD's through oral sex, it is highly unlikely that you have got an STD in the throat. So do NOT panic. You may have a normal viral or bacterial infection, because at this time of the year there are lots of bugs going about.
Sometimes people can carry a virus and not know about it and then pass this on to others through kissing. Getting this would make you feel very ill with flu like symptoms and very severe sore throat. It is caused by the mono virus and is sometimes referred to as the "Kissing Disease". Because it is a virus, no antibiotics will help, so you would need plenty of rest, fluids and painkillers. My son had this.
The other possibility is that you have a fungal infection in the mouth. You may find white specks on your tongue, inside the cheek, on the corners of your lips; your mouth would feel dry too. If you have got a fungal infection, you would require a specific anti-fungal oral gel to treat it. Pop into your pharmacist and get him to look inside your mouth to see if he can identify if you do have a fungal infection. If so, you can purchase without a prescription an oral gel called Daktarin. The pharmacist would be able to help you with that.
You could instead make an appointment to see your doctor as soon as possible. The reason for this is because of your anxiety. The doctor would examine your mouth and throat and will be able to tell you if you have a viral, bacterial or fungal infection. The treatment depends on what the diagnosis is. For a bacterial infection your doctor may prescribe an antibiotic. For a fungal infection you would be prescribed with an antifungal oral gel or oral mouth drops.
In any event, for your sore throat, you can gargle with salty water and then spit this out. Drink plenty of hot fluids - hot water with freshly squeezed lemon juice and honey to taste is very nice. If you like honey on its own, you can have some of that to ease your sore throat.
If it is a fungal problem, a home remedy before you get to see your doctor or the pharmacist, is to eat plenty of natural yogurt. I like the Greek style set type.
To put your mind at rest, anyone can get fungal infections. Even babies can get fungal infections in the mouth and on their bottoms. Fungal infections can also happen anywhere on the body.
If your boyfriend experiences any itching on his penis, it is highly likely he has a fungal infection. A special cream is applied to the washed and gently dried area before applying the cream. The pharmacist can advise on the cream to get. I am in the UK and the names of medications may be different in your country, if you are not in the UK.
If you feel anxious, remember to do your breathing exercises. Panicking and getting anxious is not helping you or anyone. It will only make you feel even worse.
When you use condoms, get the latex free ones. Some people are allergic to latex. These days you can purchase latex free condoms, but unfortunately the dams for oral use are made with latex.
I am glad that you are being sensible and taking precautions so as not to get pregnant and not allowing your boyfriend to enter you.
Follow my advice regarding the sore throat - you can also take pain relief medication for the pain as prescribed on the packet. Make an appointment to see your doctor or pop in to the pharmacy and ask if the pharmacist can take a look in your mouth.
You and your boyfriend are wise to get checked out for any STD. Chlamydia in most cases has no symptoms, but can stop men and women from being fertile.
I am sure that you will be fine.
Let me know how you get on.
Best wishes.
It's best if you get it checked out. The sore throat could just be irritation from the act itself. I have had the same thing happen to me, but no STDs. Just, keep your eye on it.