On June 27th I performed unprotected oral sex on a person. I didn't think anything of diseases at the time until the beginning of august and I noticed a pea-sized lump behind my neck (the doc said it was my cervical lymph node) and concluded it was because of these small sores I have in my head (stress-related, i scratch my head when i get stressed and it causes sores) and prescribed keflexin for a bacterial infection. that day i tested negative for mono and my cbc count was fine. i was routinely tested for hiv and other stds about 2 weeks after the possible exposure. They were negative but i know that was way too soon for hiv to be accurate. Last week at 41 days I was tested again for HIV by the Orasure test the one you swab around your gums and it was negative. This week my glands (in between my neck and jaw) became swollen but not sore and I noticed loss of appetite which resulted in weight loss of 4.5 pounds along with severe depression. I went to the doc again and he just prescribed amoxcillin for 7 more days and said to quit worrying. I am terrified at this point. I consider myself to be a very healthy person and all of these things are out of the norm for my body. I know the risk of oral sex is supposed to be low risk but the only caveat I have is that sometimes I bite the inside of my cheek due to stress and I could have had "mouth sores" that night if I had been biting my gums (i just can't remember). but i do know that there was fluid coming from his penis before I started to perform oral sex but I could have very well wiped it off with my hand before I started. He did not ejaculate in my mouth I pulled away right before it happened. I am really scared and stressed. I would like to have another test done but I am wondering if antibiotics will prevent HIV antibodies from showing up? Thank you for listening to this. any advice would be helpful.

Optional Information:
Female , Age: 23

Already Tried:
keflexin and amoxcillin