Trying to get pregnant ??

 I been trying to get pregnant with my boyfriend for a while now and it's just hard for me to keep trying to get pregnant. We have a lot of sex mostly everyday when I'm ovulation. This week I been feeling moody, tired, headaches, always craving food, stomach bothering me a lot and always waking me up because it hurts . Today I was suppose to get my period but I just hope I don't. If I do I hope I can get some advise how to get pregnant .???