Thigh squeezing/tightening masterbation

Es
Have any of you girls done the thigh squeezing/tightening masterbation technique? Where tou cross your legs and tighten your thigh muscles and you get this small orgasm? Well that's the only time of masterbation I've ever done because I'm SO uncomfortable with touching myself down there. Anyways, I'm now 25 weeks pregnant and I was wondering if this type of masterbation was safe for babies? I'm asking because the last two times I've done it, I've noticed that my baby kind of bulges on the left side of my stomach and I don't want to be hurting her.