Coated tongue after sexual contact - please help!

Hi,

So for the past 11 months I have had a coated tongue since sexual contact, if anyone has any experience or answers to this please let me know. The details are as below:

Unprotected vaginal sex (from January 2020) and oral sex (one and only time in March 2020) with same non-monogamous partner that had been tested for STDs. Flu like symptoms in March 2020, which lasted approx. 2 weeks (runny nose, cough, aches, sore throat etc). After this, tongue became coated with thick, white/yellow hair-like coating. Small ulcer appeared on tip of tongue but resolved within 2-3 days. Ulcers on gums and tongue have since occurred.

Full STD screening conducted 2 months post sexual contact and repeated at 4 months, 6 months and 9 months. Results came back negative including HIV, Hepatitis, Syphilis, Chlamydia, Gonorrhea and Trichomoniasis. Positive for vaginal thrush but negative for oral thrush.

Oral Symptoms:
-coated tongue
-Mucus in throat
-Nasal congestion
-Ulcers on gum and side of tongue (4 over 10-month period)
-Taste buds on tongue swollen/enlarged but not painful
-Sore mouth on inside of bottom jaw
-Sticky/gluey/dry lips

Vaginal Symptoms:
-Peeling and irritation to vulva skin
-Internal burning sensation
-Abnormal discharge; thick, mucus-like consistency with white flecks throughout

maybe its just an overgrowth which we do hve some bacteria in our mouths already. If you tested for everything and the results came back negative i would be happy with that. Test again to hive yourself some reassurance. Best of Luck!! keep me posted