Estrogen causes the endometrium to thicken, and peaks at ovulation. Progesterone rises at that time to maintain the endometrium. If insufficient progesterone is present at the time the estrogen begins to drop, spotting may result. This spotting usually lasts from 1-3 days and is mid-cycle and is not cause for concern.

When should I worry about mid cycle bleeding?

Many young women have irregular bleeding for normal reasons, and breakthrough bleeding during the middle of a menstrual cycle is not uncommon. However, no matter your age, it's important not to ignore this symptom. If you notice spotting between your normal cycle times, contact your doctor for an evaluation.

Why am I bleeding 2 weeks after my last period is it normal?

This is because your hormone levels drop. It is also called breakthrough bleeding, and usually happens about 2 weeks after your last period. Breakthrough bleeding should stop after 1 or 2 months. Your periods will usually become more regular within 6 months.