Thermal Over the Bump Maternity Leggings

I ordered the XL based on the size chart (pre-pregnancy I wore a size 12-14) and I am 17 weeks currently, but these leggings are absolutely falling off of me (for reference, currently 187ish lbs which is about +7lbs from my pre-pregnancy weight, pear/hour glass build with hips for dayyys and a noticeable baby bump at this point and the XL is still falling off me). Calling these leggings “thermal” also feels like a bit of a stretch. They are a slightly thicker material than some leggings, but overall they aren’t really that “thick,” more of a medium weight legging. The inside has a slightly softer brushed feel than the outside, but I don’t know that I would really liken the leggings to being fleece lined (feels like an overstatement). Overall, they are soft and comfy, slightly warmer than my other leggings, but not quite what I expected based on the description. I took the tags off before trying them on, so don’t make the same mistake I did. I love that the leggings are lyocell, but not sure If I even want to try ordering a size down for a better fit at the price point.