13 Weeks..

13 weeks today! Yay! However, I'm still scared to death.. I still hear stories about people losing LOs at 15 weeks ..21 weeks..and I'm just so scared that this will happen to me. This is our little rainbow baby. Every little cramp I feel, I wonder " Am I about to lose this baby or am I currently losing this baby?" Im scared that when I go back to the dr.. They will be like "we can't find a heartbeat" .... I don't know how to control this feeling. I really want to enjoy this pregnancy, since it will potentially be the last one (baby #3.)  Anyone else losing your mind even after 12 weeks?