Scared 5wks 5d

Ladies keep telling me that I'm going to miscarry, or saying that it scares them that I have light cramps because that's "not normal". Should I really be worried that I have cramps sometimes? They're not really bad just feels like there's a human stretching me out in there but if it's bad to have cramping then I'm actually scared! No bleeding. I bleed once very very light pink after sex when I found out because I swear it got smaller down there haha it actually hurt!