feels like labour

I know that there is 0 chance of me being in labour as I'm not pregnant but I really really feel like I am. 
Yesterday I started my AF and I was a little down because after 3 months of missed periods I was hopeful that maybe I would have caught. But since it started I feel pressure and a lot of pains in my tummy. As though I need to push. 
I feel like I'm going insane xxxxx