Fingers crossed!! Need to vent

So I was supposed to start my period today and haven't yet. although I'm all crampy and feel like I'm going to I'm praying to god I don't. I hate this feeling of not wanting it to come then it does and your all depressed. When girls can pop them out left and right Without trying and I keep trying and trying and no luck ugh!!! I'm so frustrated and hate to tell my boyfriend again that I started my period he gets so upset.