Sorry to hear that, hope you feel better soon...
That said, worrying won't help at all, it just makes things worse. Did you talk to your doctor yet? He/she might recommend something to alleviate the symptoms. Definitely call them if you feel your condition is getting worse though!
I believe there were quite a few posters on here who also had covid and suffered some breathing issues, too. @...Dan ? @The Premier Steve's ? @Danny ?