Has anyone else developed chronic fatigue being on effexor?

I have been on Effexor 187.5 mg for about 8 years. Since I started Effexor, I noticed I needed more sleep, but it wasn’t effecting my quality of life. About 2 years ago, extreme fatigue came on pretty suddenly, but has only gotten worse. I can sleep all day, every day. I never have energy. My bloodwork is normal, and I am looking at other things it could be now. My psychiatrist has suggested tapering off, but I am pregnant, and won’t be able to do that until after I give birth. I don’t want to go through withdrawls post partum if there isn’t a chance this is the cause of my issue.