Any ideas what it could be?

Around Christmas time I noticed my chest felt funny a little tight and heavy, also it was hard to catch my breath, take deep breaths and all around just felt like I wasn’t getting enough oxygen, I also felt a little light headed. Since Christmas it’s come off and on, but recently has started happening a lot more, getting me worried. I don’t think it’s anxiety because I’ve struggled with anxiety and know what it feels like. I haven’t done anything new and I haven’t taken any medicine. It’s so weird to me, I want to call my doctor but don’t know if they’d even see me with the virus going around, also I know it’s not the virus because it’s lasted for so long and I have no fever nor cough. Thanks for any advice in advance!