[shimmeringfaerie]

Did you and your boyfriend use any protection when you had sex?

If you had your period at the start of this month, it seems very unlikely that you are pregnant. Fatigue can be caused by a number of things, usually stress, which also causes moodiness. Also, you would definitely not have a "baby bump" this early on in a pregnancy. I think it's more likely that you are seeing symptoms where there actually aren't any.

Wait for your period, if it's a lot later than usual, then take a test.