Inactivity during pregnancy

Between my morning sickness, fatigue, and a favorite sudden onset of depression, I haven’t been active at all this pregnancy. I know they say it’s okay, but I mean I will literally go days without leaving my bed. I’m 14+5 now. every appointment I have been to all my blood work has come back textbook perfect, but I’m worried my lack of exercise is going to be harmful for me and/or my baby. I have an appointment coming up so I will mention it to my OB but I’m just wondering if anyone has any experience or input. I’m just so depressed and sick and really can’t bring myself to leave the bed.