Temp goes down again

Sh

So another month comes. I ovulate and temp still stays low. I never get three high temps in a row. I don’t understand my doc says temp don’t matter but then why would they have BBT charting. I know for a fact I ovulated when it says. Has any one had this happen, where your temps are always low and still be able to get pregnant? We’ve been trying for a long time and all the doctors tell me is everything’s okay with me but my husband has low sperm count but I feel like somethings wrong with me too. I don’t want to think that but once you’ve been trying for so long everything goes through your head.

I released the late on CD 18