Unmotivated and lazy!

Alex
Help! I was really active before I got pregnant then morning sickness hit and I was sofa bound for 10 weeks. I'm feeling much bette now at 17 weeks but I'm stuck in a lazy cycle! I just can't be bothered to do any exercise. I know it's important to keep active but getting up and going seems to be mission impossible. Any tips on how to get some motivation??