Dont think I'm pregnant but possible...help??

Brooklyn

So been 3 days late on my period but been still getting slight cramping in my lower stomach and it reaches around to my back I keep thinking my period is coming everytime I feel it and nothing comes. Me and my bf been together for 6 years and we always have had unprotected sex just because his sperm count is so low we never though I could get pregnant...theres been times when I been late but not this late with period cramps as well. Just never thought I could get pregnant with him since theres been so many times hes came in me and I would still get my period. I'm not totally freaking out but once i hit the 5 day mark of being late I will take a test. Any thoughts? Or things I should be doing? Should I tell him? Or not make him worry cuz I could still get my period?

The one time I dont want to be pregnant smh.