Sick and tired of being sick and tired!

B • 4 kiddos. Newest edition: baby girl born 2/2016
I'm 11 weeks today and for the last three weeks I am so exhausted!!!  Nausea seems to subside after the morning, but I am always tired.  I haven't been able to get myself to go to the gym all week and I just want to lay in bed all day.  It's starting to make me really depressed😔