hi it could be just your hormones out of whack most of what your saying could come from that. see your doctor and get blood test done for a hormone check but if you do miss your next period please do get a test done also best at your doctors. do hope this helps you. good luck
is it breakthrough bleeding? last period started june 23-29. had sex 14 or 15 of july. got period on july 20th. some things i've been experiencing. feeling low on energy. having lower back pain. for a day i felt nauseous woozy tired stomach felt tight. breast felt bigger and a little heavy. but are now back to normal. also asked the same question on a different website where you can ask doctors. was told it was breakthrough bleeding and i should see a doctor. just wanted a second opinion.