The best thing you can do is go to your doctor to have it checked out. As said before, what you posted was vague, but I will try to work with it as you seem very worried.
First of all,
Two days after having sex is NOT enough time to experience symptoms of std's, because std's take longer to develop in your body - just to stop any worry you might have of it being due to std's. Also, your symptoms do not match any of the common std's anyway.
This is good news if you were worried about that.
And it depends on what you call normal, for women who engage in rough sex, it can be very normal to have abdominal pains for a few days after. If he is hitting against your cervix it can irritate things, and that is completely normal, although it might be a caution to be more gentle, as some womens cervixes are more sensitive than others. Also, light bleeding and spotting can be caused by rough sex as well. From personal experience i know how it is to have to take a week off of sex because of pain, and bleeding due to rough times. Also, if you abstained from sex for a long time, sex might be irratiing to your cervix and walls even if it's gentle.
If that is not the case and your sexual encounter was nice and gentle, you should visit your doctor and get a pap done, as you could either have a starting of a yeast infection, or another type of vaginal infection.
You may relate yeast infections to being all about itch, abnormal discharge, and yeast, but the pain is a common symptom, as well as pain during urination. Sometimes it is common that women get yeast infections after sex. Yeast infections are easy to treat, so don't be worrying about it, you can even just visit a drug store and pick up the various different treatments they have for it. It might be best however, to make sure it is that first, by visiting your doctor and having an annoying exam.
ALSO, you may have the beginning of a bladder infection, which is also sometimes common (for some odd reason) after sex. You will still have to undergo the great things of being a woman, like peeing in a bottle to make sure it's that, in order to figure it out.
Spotting after sex has been said to be common as well, some of the causes can be, vaginal infections. (not to scare you, they can be treated, but Seeing your doctor can bring your mind to rest about it all.)
Sometimes it's something as simple as you irritated something during sex and didn't even know it.
Lastly, IF you are a virgin, it is common and normal very much so. Just included that because you didn't say.
Hoping that helps a bit,
go see your Doc! And try not to worry so much, it doesn't sound like anything really bad.
Need more details. What exactly happened during the sex? Was it with condom or not? Were you well lubricated or dry vagina? Are you spotting fluids or blood as if your menstrual period is coming on?