17 weeks pregnant and sleeping too much?

Hi I'm 17 weeks pregnant and I'm all the sudden so tired again. Just the past couple days I've been sleeping so much again. I went to bed last night around 10 pm and woke up twice during the night to pee but went straight back to sleep. I woke up around 530 with my husband to make his lunch and visit a little before he left. Took a shower, ate breakfast and fell back asleep from 840 until 11 am....

Is this normal? Lol I know there's a lot of weird stuff during pregnancy but I thought 2nd trimester was supposed to be "better" and yet I'm feeling as tired as the begining.