TTC for baby number 3

Stephanie
We are currently trying for baby number 3. I have 8 days until my period. I am completely exhausted all day. I feel like I've gotten zero sleep. When I wake up I feel a strange warmth. It's not like I'm hot. It feels almost like my body isn't waking warmth. I'm not good with explaining. I'm just curious if anyone had ever experienced it before? I'd love to know that I'm not crazy honestly. I want to give a thanks to those who comment and try to help me. It means a lot. I don't want to tell my husband because I'm worried he will think I'm insane hahahaha