think I might have caught something
Like you, I think the prospect of HIV infection in this scenario is unlikely - in the extreme - I do not believe you have acquired HIV.
The chances of the lady being HIV positive are remote.
Your activity was limited and not convincing for an HIV risk.
Your symptoms etc are so vague as to be anything.
The only way forward is to have an HIV test at an appropriate interval - 10 days using PCR, 28 days using HIV DUO and that will give you the answer.
best regards, Sean