I'm irregular. my cycle comes on randomly every few months. yesterday, i guess i came in it was red but hours later it was brown. today there's nothin?

Very common: Brown is just old blood. Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections & hormonal changes can cause spotting. There are many options available to help regulate the menstrual cycle. Schedule a visit.