Placenta Previa 30 weeks

This week I had a bit of an episode where I passed a rather large blood clot. After a trip to the Er and checking on me and baby, I was diagnosed with marginal placenta previa. This is my 2nd pregnancy and have had no complications up until this point. I do already have a scheduled c section but now I’m terrified it will happen again and every ache and pain is something to be concerned about. I do have pain in my groin and I can’t tell if its just stretched out ligaments or something else. Looking for advice, something to calm my worry. Anything at this point.