My heart is beating fast and I have shortness of breath.? I have anxiety but This doesn t feel like it at all, plus I have nothing to be anxious about. I also am anemic and stopped taking my iron for a while and i m badly anemic I ve been freezing lately, but last night My heart was beating so fast and couldn t breath good it s weird, and today my heart is normal I think but I m still having trouble breathing like deep in should I make a doc appointment or something what wrong :( ? I m seventeen, My skin looks fine, my breathing is a lot better I took a shower but still it s a bit hard, I m waiting for my dad to call and ask him what to do and tell him to make my appointment cuz I don t even have the # to my doctors office, so yeah. Also I know it was stupid to stop taking my iron it s just it bothered me and then I just kept for getting to take it, very stupid I know. I also just finished my 2nd pack of birth control pills im on the white ones now the inactive ones, I don t they yaz is bothering me though I ve been fine and right now im not even taking them I m suppost to get my period so I don t think my heart would race for that reason and shortness of breath.