Not pregnant

I've had all the symptoms and I had the missed period and all that to find out I'm not pregnant so it had me thinking why and how? Well Because of birth control. I was only on it to regulate my period not knowing the effects of it now I possibly have to wait 2 to 3 months to start ovulating correctly again and I'm mad because I've told people I'm already pregnant when I'm not and now I'm in my bed crying my eyes out writing this because I'm not pregnant. But I'm not giving up I'll just have to keep pushing and have fun trying to get pregnant. I keep telling myself everything happens for a reason and not to get frustrated.