i am a mother of two which my cycle have never been regular i was on last month for like 3 weeks light and this month i have not seen nothing i am allways fatigue and latley i have been gaving cravings for crabs i ate crabs 3 days in a row everytime i ride by a seafood place i think of crabs i don't even like crabs at all i took 3 home pregnacy test and they have all came up negative i am going in to schedule a blood pregnacy test my left nipple is a little tender and i smoke ciggaretts but latley when i do smokle i have been getting light headed everytime after i smoke a ciggarette what am i to think ? what am i to do? 8-|