Welcome to HCM,
After going through your history, it is unlikely that your strep throat infection
and fungal infection
is related to HIV
You have been treated for infection of throat please take treatment for fungal infection also after consulting your Gynecologist, you will improve soon.
About your chances of HIV as you have doubt about your partner so please test your self for HIV which is most likely will come negative and will relive your anxiety
abut remember to repeat this test after 3 months.
Your partner was also HIV negative last year so he can repeat the test if he is negative it will relive your anxiety also.
In the mean time both of you should practice safe sex and faithful to each other.