Stomach pains

I’m estimated at around 4-5weeks pregnant. I had a miscarriage back in March, so everything is making me freak out! How do I know if I’m having cramping or if it’s just bloating/gas. I had no symptoms for my last miscarriage, had to have a D&C; because my body didn’t grasp the concept that the baby was no longer with us. Not sure if I should go in or if I’m just over reacting. I don’t remember all this in the beginning of any of my pregnancies (I have a 5 & 3yr old.)