you need to wait about 4 weeks after going on any birth control to ensure that you're full protected. Some women don't get protected as soon as others, but after being on a month - you're as protected as you're going to be on it. You never mentioned you were on the depo - that is most likely the reason for everything you're feeling.
i could be but i doubt it because i got a pt done about a month ago and it came back negative i started depo but is it safe to have unprotected sex one week after starting depo because i read that you should wait 2 weeks but i didnt know that
Is there any chance you could be pregnant? A missing period, and feeling like it's coming or you should be on can be a sign of pregnancy. If you're not pregnant and haven't had a period since February you need to see your doctor.