So bummed

So I was on birth control the last two years . I got off of it November 2015, haven’t been on anything since and I started getting periods again about 4-5 months ago . Last month it was 5 days late , lasted 3 days instead of 6 and now I have pressure in my lower stomach and have to pee all the time . I was hoping I could be pregnant but took a test today and of course it’s negative . I feel like just giving up like why can people that dnt even want kids get pregnant by closing their eyes but yet I want a baby so bad and can’t get pregnant