15 DPO... NO pregnancy symptoms

So according to my Glow, I am 2 days late for AF... I haven't had any abnormal symptoms to make me think I may be pregnant but this is our first month actually TRYING to conceive so I just HAD to test (especially because my periods are very regular and NEVER late). I tested late in the day and almost immediately got a BFP! At first I thought I was seeing double but then got an opinion from a friend and she concurred it was absolutely a positive! Immediately I am ecstatic. But now that it is setting in, my anxiety grows at the thoughts of losing it. I had a completely unexpected miscarriage over a year ago and I had always thought that would NEVER happen to me. Both of my sisters have severe PCOS but it skipped me (middle child), so in my mind that kind of thing could never happen to me. But it did. The baby attached itself to my C-section scar and I had lost it at only 4 weeks. I can't help but run to the bathroom every 30 mins to be sure I am not bleeding and I am having mild cramping and every second of it terrifies me. I just pray to God this baby sticks and that maybe I'll even get the little girl I always wanted. (Have two boys now.) Wish me luck!