“Yes, it took 3 weeks to subside and 3 months of congestion”… Wow that sucks!
Sounds like your initial encounter with COVID-19 might have been more potent than what I contracted here stateside on the west coast. Eight days from onslaught to fever elimination, that was enough for me to come away feeling totally spent. Sure hope these after-effects that both you and I and probably tons of others have been dealing with dissipate over time, so we can return back to how we felt before the infection. Good luck, take care and stay safe!