Cycle day 31! Af due today! When should i test?

jennifer
So ladies af was due today and no sign of her yet thank god! No af type sypmtoms however i am feeling a strange twinge on my right side which i felt 4 2 days on and off around 4/5 dpo any1 ever experienced this and bfp? When should i test 2morro am or wait to the wknd? Any feedback would be appreciated x