Second Pregnancy Anxiety

Baby #2 was 100% planned and we are super excited. But I dont feel the same way i felt with our first. I dont have all the symptoms, just some occasional nausea. I wasnt worried at all before our first ultrasound with our first baby, but we our first ultrasound for #2 tomorrow and I've had this constant panic of "what if there isnt actually a baby in there?" I dont know if it's because this time I had what I assume now was implantation bleeding, but it seemed heavy for that to me. I had a negative test, bleeding 3 days later for a short time, and a positive 2 days after that. Is it normal to have this much anxiety over everything? Am I being ridiculous?