So first, it is very unlikely that you'd get an STD from this, though it is possible.
You'd also not get symptoms of an STD that quickly. It takes at least 2 days for symptoms of an STD to appear.
So what's happening? Well, how rough was the fingering? Maybe you have some irritation or minor injury. Saliva as lube is generally not enough.
If you really are only getting a couple of drops of urine, and haven't fully voided your bladder in what - 4 days? - you need to see a doctor TODAY. This is an urgent medical situation. Go to an urgent care or an ER. Seriously. Do this today.
You're cold and clammy, have diarrhea, pain, and can't empty your bladder. This is an urgent medical situation.
I don't know if it's an injury or prostatitis or what, but GO TO THE ER OR AN URGENT CARE. Be honest with them about what happened. It's a must. You don't have to tell them it was escort, but tell them you had anal fingering and rimming.
Let me know what happened.