Period when pregnant?

My boyfriend is convinced that I’m pregnant because I’ve been moody, been having cravings for pickles (which isn’t weird for me) and I was 11 days late (which IS weird for me). I took some pregnancy tests which came out negative. But he’s connecting all these things and is basing it off of when his ex wife was pregnant and she had her period while pregnant. I’ve never met anyone who had their period while pregnant so I didn’t believe him. He kept saying that he knew a bunch of girls who had their period while pregnant but it makes no sense. I’m having one of my normal periods (normal considering I’m late and when I’m late my period is extra painful) so I don’t think I am but he keeps getting my hopes up. Have any of y’all had a full blown period (including bad cramps), had negative pregnancy tests, and were still pregnant?