Brown and red spotting with little bloodclots instead of period when i use the bathroom and wipe. had protected sex 2 weeks ago. whats going on?

Irregular menses: Irregular menses makes one think of possible pregnancy. However, spotting and passing clots instead of having a regular menstrual flow can reflect an anovulatory cycle, thyroid abnormality, missing birth control pills early in one's cycle, infection, or can happen spontaneously. Do a pregnancy test to make sure you are not pregnant, and discuss with health care provider about possible causes.