Anyone Else?

With my daughter, before I knew the inside outs of ttc & miscarriages, I was on cloud 9 with that pregnancy. In 2016 I had a miscarriage which I kind of knew it was coming from the HCG not rising and me bleeding. With this pregnancy, I just feel like I'm so negative! I measured one week behind which I wasn't surprised, my periods are not regular and I don't really track anything. Then no sac, which again 4 weeks I wasn't surprised that their wasn't one because from what I've read, that is early! But my HCG was OK from what the doctor said and in range for that gestational period. I get my 2nd set of results tomorrow & I just feel so doubtful! I hate that because I'm so excited to be pregnant but I just constantly worry!