So emotional

Lately iv been so emotional i could just sit  and cry all day for no reason, i feel really insecure about my boyfriend for no reson i just wanna know   what hes doing all the time and get upset when hes at work and can't answer my calls hes not doing anything wrong but everything he says makes me so emotional i must be driving him crazy is anyone like this? Im not on period or anything iv been like this for weeks