Worries early pregnancy

Hey guys, so I’m always paranoid that I’m having another ectopic or miscarriage. Couple days ago I was spotting it lasted a day and went away. Today I am 7 weeks 2 days pregnant and have been cramping and have pain in my right side so o keep thinking ectopic. My thing is I had an ultrasounds done already and they saw a sac and baby even a heart beat, but I’m still thinking maybe twins and one is stuck. My head is just traumatized. Any words of comfort or anything you might have experienced before anything helps. Here is a pic of my first ultrasound. I get my second one in a week.