Based on above history
You need see doctor urgently, oral thrush
could be esophageal candidiasis
one of the common condition in HIV patients.
You need to have HIV test
done, and if its positive viral load
and cd 4 count should also be taken. You should also be started on septrin prophylaxis if tested positive for HIV and later ARV depending on cd 4 count.
You will need to counseled before all these tests are performed.