Worried after miscarriage in January

Mayra

Im 8 weeks and 4 days pregnant today and I can’t help feel scared about just anything I feel or see different with my body. I have been having some very light spotting for about 3 weeks and some cramping here and there but I had an ultrasound at 7 was 3 days and heartbeat was 150 and baby looked good. I just can’t understand why this lower abdominal pain keeps coming back. :(