Maternity Yoga Pants?

Hey Ladies! I'm 7 weeks pregnant today and already finding a lot of my pants (including some loungers and yoga pants) are getting to be too tight and uncomfortable.

I work in a physio clinic so often wear Lululemon Yoga pants to work and home. Desperately looking for a good website to buy online from before this becomes a serious issue. Wondering if anyone knows of any online stores that are reasonably priced?

Any suggestions are appreciated ❤ Thanks all!