Could I still be pregnant

Has anyone ever taken a while to get a positive pregnancy test? Like did you ovulate late?

I’m on cycle day 41 (my cycles are usually 33-33 days) so my period is a week late, I took 3 pregnancy tests plus a digital last Thursday (the 12th) and they were all negative, I had period cramps the day I took the tests but my period has yet to show. I never get cramps unless I’m actually on my period and cramps were the first symptom I had when I was pregnant with my son but like I said my tests were negative. Maybe it was implantation cramps?