Scared to have sex while your pregnant

Ok, I've a had 2 healthy pregnancies but with my 2nd I would bleed during or after having sex. It was really scary! So in '15 I had 3 mc. Now that I know I'm 4wks 3days I'm scared to have sex. I feel like that's what caused 2 of the mc. I hate feeling like I'm only limited on what we can do.