Hi,
Sorry to hear about the anxiety you’ve been experiencing. In short, you have nothing to worry about.
The chance of HIV transmission through the sexual acts you described is very, very low. Although other STIs can be passed through oral sex, we don’t see people contracting HIV that way. See our Know Your Chances (Oral Sex) page. Also, sores in the mouth is not a symptom of HIV.
Further, it is normal to experience anxiety and other emotions after having new sexual encounters. For some ideas about how to manage the feelings you’re describing see our Worry and Anxiety page.
Hope this helps. Please feel free to leave a comment for clarification or submit another question if needed.
Health Nurse