I’ll try to keep it short, 24 days ago I had oral sex give and receive with a trans, for 2 min, both of us didn’t cum, it was very brief and she/he said can’t cum due to hormones pills. 

I always have health anxiety so I’ve been stressed since then.

After 21 days I went to do full std test and all negative, until now 24 days since the exposure no obvious symptoms.

I’m mainly worried about syphilis and hsv2, h think my test results will change since I need to retest after 6 weeks, for how long should I look for sore-chances-blisters. 

Is my 3 weeks negative syphilis test reliable? 

Where should I mainly look for the sore-chance-blister?