tired all month long?

all month I have been tired. no matter how much i seem to sleep I'm tired. I work from 6 till 2 am as a waitress and my sleep schedule has just not been the same this month. moody and back pain like crazy. light cramps here and there and sensative breast since the 14th.. when I ovulated. me and my boyfriend have had intercourse but he does the pull out method.. I feel like there's a posibility but at the same time it could just be pms :( I should be starting in days ..

what do you think?