 [ Symptoms ] 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 have 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 [ Disease ] how did the doctor know it was infected