Almost 23 weeks

I will be 23 weeks this Friday with my second boy. I have a 2 1/2 year old and I'm a SAHM. I'm literally so exhausted with pounding headaches daily. I need some advice, I have a hard time napping during the day and go to bed between 8-10 every night and up no later than 7:15 every day. I can't stand this fatigue anymore, do you ladies have any advice on how to feel better? I'm literally laying on the couch all day, every day. 😴