Hi i've been spotting on and off for over a month now. why? and what should i do now? im kind of nervous about what could be wrong.

Multiple causes: There are lots of possibilities here. Main ones are 1. pregnancy 2. anatomic reasons or 3. endocrine reasons. For 1. rule out pregnancy with home test(urine). For 2. your doctor can perform tests to rule out polyps, fibroids, etc. For 3. you may not be ovulating and your lining is slowly breaking down and leaking out. A progesterone challenge can be used to clear out the lining quickly.