When should i ?

So I need yalls advice ladies. TTC and I'm suppose to get my period yesterday and it hasn't came. I noticed about a week ago that I was spotting and I was having back pain and cramps. It stopped but the last few days I noticed it starting again but didn't think much of it because I thought it was just me getting my period soon. Since it hasn't came, how many days should I wait to test ?? Or if I test today will it be accurate ? I really hope I don't get it and this is it for us! #BabyDustToUsAll