Stressed out

So I had covid was diagnosed may 28 , tested positive again around June 16 . My doctor said they wouldn’t test me anymore. I went to Walgreens recently to get tested, cake back negative but I still don’t believe it. I feel fine just worried what if something is wrong with my lungs and I don’t know it yet cause some days I feel shortness of breath and I don’t know if it’s cause I’m 23weeks pregnant. My doctor never checked on me again like not one call at all. I feel so failed, my ob either has to check up. I feel so mad at the system, imagine how they are doing other pregnant women .