lethargic, amongst many other things. I sometimes feel like my head is spinning and I get major migraines and I never have got one before . I am on b/c and I am due for my next shot in 4 weeks. So, now I am really confused.... Since I have been having sex for the past 3 weeks, if there is a chance I am pregnant? I would like to know your opinion, before I buy a test and/ or get tested.