Pregnancy after miscarriage

I had a miscarriage on November 1st at exactly 6 weeks. I am pregnant again and am exactly 6 weeks today with this pregnancy. I am terrified of miscarrying again. I've been checking my underwear for blood almost every day. I am however very thankful that I've made it farther this time than last. Praying for a sticky bean. Is it normal for me to be worrying this much? I'm obviously thrilled to be pregnant again but I'm trying not to get too excited. :/ pregnancy loss sucks.