Sorry to hear you are still feeling it. I hope you recover soon.
I have not been sick in many years. I do have sinus issues that have plagued me for most of my adult life. I'm also overweight, diabetic and hypertensive, which puts me in a "high risk" category to catch this crap, but, as yet, I have been just fine. If I have had it, I have been asymptomatic. I have never been tested, nor have I been vaccinated. I have been living life as usual, traveling in and out of state like I did before all this garbage began.
Several family members, several former co-workers and several friends have tested positive. Some got sick, others did not. One was hospitalized, but was back to work in a few weeks. Based on what I know about this, I can offer no information nor advice, only my concern for your condition and my hope that it improves.