Worried Again

So after having a month thinking I was pregnant and it turning into me being seriously paranoid, I'm back again, ive now been on the pill for 3 months and had regular periods I'm due in a few days (when I take my 7 day break) I'm just very worried again as I feel bloated and I've had loose stools as well as recently started getting very tender nipples. I don't want to have to go though the worry again so may go to clinic and get a pregnancy test again. It just makes me so anxious and upset 😭.