Okay so quick back ground my lmc was Oct 29th I was supposed to start Nov 29th but nothing no spotting nothing! When my period is like on the 31st of the month it always shows up on the 1st of the month Always , I've tested two times this week on Tuesday and yesterday and nothing bfn 😣 I've been having sex with my husband to see if af would show ND nothing . Idk what's going on my doc doesn't have any openings till Jan 1st I'm just in need of advice please help 😦

Ps . Does the brand of the hpt matter ?