My heart feels like it will randomly start racing, even if I'm just sitting on the couch. Nothing scary or exciting is happening to cause it to raise. Also it always seems to race pound really hard after i get out of the shower in the morning. I recently discovered I have an app on my phone that can measure your BPM (so I'm not sure how accurate it really is- S Health app) but I have been randomly testing mine and I guess my "normal" is about 75-85bpm but every morning after i get out of the shower, it goes to 165-175 bpm. Is this normal? should i be concerned? I'm Im 25, dont smoke, on socially drink on rare occasions, Im of average weight, and the only medication i take is adderall every morning after I get to work.