Those are vague symptoms, and could be anxiety or the start of something, or an allergic reaction or a fungal infection, etc.
Does it itch and burn inside or outside, like on the skin? It sounds like on the skin since you are looking for bumps and rashes?
Did you perform oral sex on your partner? If you didn't, your sore throat is related to something else, but should definitely be checked out since you still have it after the negative strep test.
You can be tested for gonorrhea, chlamydia and NGU (an infection in the urethra) at 5 days after exposure. You can test for HIV at 28 days if you get a 4th generation DUO test. You can get a type specific herpes IgG blood test now, but you'll have to get another one at 4 months if it's negative. (A note - there are some false positives with hsv2 tests, and some places like Canada, the UK and others don't like to do the blood tests. If you live in one of these areas, you may not be able to get that test.)
You can get a syphilis test at 6 weeks.
Are you normally anxious about STDs? Are you worried about infecting a regular partner you have? I'm just trying to get a feel of how much this could be anxiety driven. Don't discount anxiety, either - it can manifest actual real, physical symptoms.