My and my fiancé are TTC

TeAnna

Me and my fiancé have been TTC for about 3 weeks now, my period was due Sunday but it’s Friday and no sign. I have been incredibly moody, I have caught a cold which is unusual for me, and I have aches in my knees and my lower back. I’m worried that it is too early to test but I feel like I may be pregnant. Should I go ahead and test or not?