I have. The one time I got COVID, it felt like 40-50C all week plus humidity, I was masking with an N95 the whole time when I was around people, but because I was working an outdoor music festival, 95% of the people I was around wasn't.
I especially could barely get out of bed, had to use my inhaler about 5-10 times a day cuz it kept triggering asthma attacks, my limbs hurt so fucking much, I was nauseous and light-headed and had insane brain fog. It got better after 2 weeks but I was only really ok for about 4 hours a day and could only be vertical for about 2 or I would get really sick.
I had long COVID for about 2-3 months after that, which included severe brain fog, struggling to breathe, and easily got tired all the time.
I also get COVID-like symptoms when I get the vaccine for 2 weeks all 3 times I got it.
I really wish people would understand that masking is to protect other people by not spreading it to them, not yourself from getting sick.