What are normal side effects for birth control pills? I've been on birth control since April and in August I started having breast pain, mild cramping, bloating, nausea, and my "period" had lightened up a lot like it's not even there. Its October and still having those feeling now with pelvic pain, increases sex drive, back pain, and it feels like I keep getting kicked in the vagina. Is this normal for birth control? I have had 3 kids and never been on birth control till now so is this normal?