Pregnancy anxiety

I cant seem to get these paranoid thoughts out my mind. When i was pregnant with my son i was highly anxious something bad was going to happen, now im pregnant again my anxiety feels even worse than it did when i was pregnant before. I think because son was delivered by cesearean im thinking this baby has implanted onto my scar, or that im having an ectopic. Im cramping, not painfully but belly feels uncomfortable like im full of gas but im not gassy. I also had spotting around time of missed period this time and no other symptoms, its going to be a long pregnancy