off the rack wears for bridesmaid

Can I have a private post please. Been on the pill for 3 months. The one that you take continuously to stop any bleeding. Anyway I had breakthrough bleeding so was told to stop the pill and bleed for 4 days and then start again. I didn't even think about other contraception but now for the last week or so I've hot really really sore boobs. Get bouts of feeling sick. Heartburn and just so tired. Can these just be side effects from the pill? I'm back at the doctors tomorrow for a review but I'm so scared. off the rack wears for bridesmaid
Could I be pregnant and these are symptoms or could it just be side effects of the pill. Thank you