MISSED PERIOD/late ovulation

Hi!

I ovulated Dec 8th per ovulation test strips. (I usually ovulate late) 11 days po as of today.

I am four days late on my period. (Start date 16th)

I do have symptoms. Cranky, backache (mild), sore breasts, and cramps. I have no spotting. I have taken a pregnancy test and it is negative (very clearly negative).

Do I wait to see if I start my period or should I keep testing for pregnancy? 🥲

Thank you ♥️