Need help from mommy please

I dont know if any pregnant moms had this before. Currently 35weeks and since last night i have been having "numbness" on my left thigh.. it's on and off and affecting only at the front part of my left thigh. The feeling is like when im scratching on the numb part on bare skin, it feels like im scratching over a layer of clothing/cloth. I hope your understanding what i mean. Is that normal? Im freaking out.. #firsttimemom #advicepls #FTM #firstbaby