Thunder thighs

Wr
I am 22 weeks and have gained about 5-8 lbs (not 100% sure I will find out at Doctors appt Friday). I have a small baby belly but I feel like all the weight has gone straight to my thighs and hips! I'm walking daily, doing yoga at least once a week and doing 100 squats a day. Anyone else having the same problem?! Suggestions?!