Sorry to hear that; there are probably a lot of people who went through similar experiences.
Here's something that may help:
viewtopic.php?f=36&t=208
I lost my sense of smell at the start of the year, despite taking precautions, wearing masks, etc. I can't remember how long it lasted, but at least several weeks, and I think that it wasn't quite right for up to around two months.
That led to me drinking no more yancha, and only cheap old puer, since the former has lots of interesting aromas and flavours which disappeared, whereas the latter is just a smooth and relaxing drink for me. You may want to adjust your tea habits similarly, to avoid teas with bitterness and astringency, and focus on things that have a pleasant mouthfeel and which make you feel comfortable.
I recall my sense of smell coming back in bits and pieces. I first noticed that I had been infected when something didn't smell the way that it should in the morning, and then I could no longer detect any smells by the end of that day. At the start, I'd smell absolutely nothing; later, I'd get a 'glimpse' of an aroma, which would then disappear; that was frustrating, but encouraging. Eventually I started 'glimpsing' more aromas more often and for longer periods, until it seemed to get back to normal.
I've read about people who didn't recover for many months; fortunately that didn't happen to me. I also seem to recall reading that people have recommended training yourself to recognise aromas once they start to come back. I don't know anything about that, though; it's probably something to ask a doctor.
Andrew