Scared!

Hello all! I'm pregnant atlast with my rainbow. I'm gonna be 15 weeks 1 day tomorrow and I have my next OB appointment tomorrow. Dunno why but since 3 days I'm getting awful and dreadful nightmares that I have lost this baby too. I wake up crying and I just can't divert myself from those dreams. They're haunting me! I can't lose this baby! It's the first time I've made it this far! 2 and half years of ttc struggles with PCOS, a chemical pregnancy, one missed miscarriage at 9 weeks.. And now I'm finally pregnant again with rainbow and made it this far for the first time... Really scared! I really dunno what to do. Need to let all this out... Please advice! What should I do? I have a feeling that I'm harming my baby... 😩😖😖😣