Miscarriage , very unsupported & lonely

Okay so I recently had a miscarriage , & my SO’s mom is telling him i faked my pregnancy & the miscarriage. & he seems to believe this , coming at me all different types of ways...This happened to me , my body & now I’m beinh attacked mentally by those who “love me”. & the miscarriage happened like a week ago , & my SO is questioning me asking me how are we having sex if google says you should wait two weeks. I did not have that question come to my mind , so i never thought to ask that or find that out. But sex isn’t hurting me . Like I’m just so tired of being belittled & called a liar when he literally watched my body change in the course of time I was pregnant.