Please tell me what you think. Sick worried!

Hi, i m going crazy this morning.i m so worried. I m 8 DPO and yesterday was my 3rd shot of Progesterone so i had in my mind that i will wake up to a higher bbt but instead it went lower? Could that be possible?  With the other 2 shots this month  bbt risen. This is the 3rd cycle that i m on progesterone and this month is so totally different. Please can you tell me what you think? Does this mean i m out this month?