In the 14th and 15th day of my cycle had spottng then got my perod 10 days early, and my left breast hurts for the past few days, should i be concerned? i have started taking folic acid 2 weeks ago, could it be related to that???

Depend on your age: it really depend on your age. folic acid is a good supplement,but it will not cause pain in the breast. pain in the breast is not a bad sign by itself. if the pain persisted more than two cycles see a doctor. take a combination of ibuprofen 400-600 mg and vitamin E around 1000 unit daily.that might help. do your own self examination at least once a month,twice in two different time of your cycle.