Last month i tested twice, once before AF was due, once after. Both BFN

Month before i tested 3 times, 2 before AF was due, 1 after. BFP on the last test but had a chemical preg.

Month before that i tested 7 times. 2 before AF was due, 5 after. 4-5 BFPs(cant remember which) but only faint but went on to m/c

This month ive told DF not to let me buy a HPT until well after AF is due, if she doesnt arrive of course. I figure i wont get the disappointment again and just think she's very late if i got another BFP early on and something happened.