I am trying to conceive and I am currently 10 days late for my period. I have taken several hpts, all negative. I am regular with a 29 day cycle.

Testing too early, you can not (or should not) even start testing till you are 14 days late.

Also always use first urine of the morning when you wake up.

If at 14 days late, still negative, test again each week, till positive or till you have a period.