Should I continue progesterone?

Hi ladies, I’m today I’m 11 dpo. Confirmed ovulation with opk, ultrasounds, and bloodwork. I took letrozole cd3-7 and ovulated cd13. I have been on endometrin suppositories since 1 dpo based on doctors instructions. I have an hcg test and progesterone bloodwork scheduled for Monday, but I’m getting all BFNs. I have been testing with easy at home strips and used a frer today. It’s the weekend so I can’t contact my doctor, but do I have to take the progesterone until the blood tests confirms? I do not think I’m pregnant. I just am worried the progesterone will delay my period even longer and I don’t want that to happen. What does everyone else do?