Can to much sleep be harmful?

Can to much sleep be harmful to my baby?im 7 weeks pregnant and I slept all night the night before,yesterday I took a nap from 11am-3pm after sleeping through the night and waking up at 7 am.than I fell asleep at 7pm yesterday woke up at 11pm ate food and passed back out until 6 am now it’s 11 and I’m tired as hell and wanna sleep but don’t wanna spend my whole weekend sleeping and I’m wondering if it’s harmful?im sleeping 8 hours a night and still needing a four hour nap during the day.i am beyond fatigued.