Flat bbt temps after ovulation?

Br

I’ve been temping for years and I’ve never seen this many days in a row of the same temp. I checked my thermometer (bbt thermometer) later on this morning and the temp was different so I know it’s not the thermometer, and I haven’t even had that one a year yet so I don’t think it’s dying. I can’t find much about this, does it mean I don’t have enough progesterone to increase my temp further? I go to the doc on Thursday so I’m going to bring it up then but I’m just curious if anyone else has ever had this happen? We have been trying for baby#3 for a year now and I’m driving myself crazy each month!