symptoms... of what??

SO. I don't know what to think/do. My insurance doesn't kick in until October so it's a waiting game, truly. 
June 17th I had unprotected sex. He didn't finish inside of me, although I know pre-come is a thing. Since then I'm had regular periods on the 28th-30th of June, 27th-30th of July, and 29th of august -1st of this month.
I worried myself SICK and took tooooons of pregnancy tests. I'd say around 20 over the course of those two moths. All negative. I took one last week, negative.
My breasts have slightly visvible veins that I noticed the day I had unprotected bc that's when the pregnancy thoughts kicked in. They may have always been there, I have no idea. The month of June-July I had abdominal cramps, sore boobs. So that's what fueled the fire.
Now I have symptoms of a sore throat, itchy eyes, breasts veins, lower abdominal pain, stinky pee, and yellow discharge.
I know those signs can be linked to MANY things. pregnancy, bacterial infections, STDS, JTIS. A lot. I will not stop worrying until a doctor looks at me and shows proof that I'm baby free. I'm sooooo stressed that I may be pregnant, because of ONE reckless night. 
I wish I knew so I could stop wasting money on rats, and stop worrying my mind. 
Can anyone tell me if they've experienced these symptoms and it ended up being something completely different?