Uneasy feeling

Anyone ever have a really uneasy feeling about their baby or delivery. This pregnancy started out as a possible miscarriage to possible ectopic until they finally found a sac and heartbeat. Maybe the rough start is why I'm feeling this way but I can't help but think something bad is going to happen. Every appointment is stressful for me. At least I'm 25 weeks and feel baby kicking all the time so that's reassuring. But I keep feeling like I'm going to go into preterm labor or have complications with delivery. Doesn't help I'm also deciding between a VBAC or C-section. I'll be 18 months post partum when this baby is due. I just want March to get here.