Hai, Welcome to HCM.
Oral sucking of penis, anilingus, fingering with a HIV
unknown status individual and having gum disease
put together increases your risk for HIV can not be ruled out. At the same time insertive or penetrative sex is at more risk which you are protected with condom. Anyhow you have to be tested for HIV to clear your status. During window period also you can be tested for HIV with other than common tests like rapid test, ELISA
and western Blot test. You can have P24 antigen test or DNA PCR test which are become reactive within a weeks time after the entry of organism.
It is little more costly and available at specialized centers.
That will solve your mental agony. Try to stick to one partner and the contact should be protected throughout the act .
Get cleared soon. Dr SM.