Light pink bleeding yesterday and darker blood when i urinate. my cycle is about 33 days long and i'm on day 19 what could it be.

Irregular bleeding: Spotting is 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. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.

An OBGYN exam: Could be (in fact is!) important to set up. It may not be anything scary, but there's no way to know w/o an exam. Guessing is pointless since there's nothing that can be done about whatever it is unless you are seen. Your usual Doc can be a good 1st step. Best wishes.