Could use some positivity!!!!

I’m 18 years old and I am 4 weeks, 2 days pregnant with my rainbow baby. I lost my last baby in September 2017, at 9 weeks, 3 days. My friend and my boyfriend are telling me this pregnancy will last and that this time I will have my rainbow baby. I see so many women on here who have lost multiple pregnancies so I can’t help but think “if I lost the last one.... what if I lose this one?” I don’t think I can lose another one. I don’t know what I’d do :( I just want to my rainbow baby so bad:( I just need some positivity or success stories to read :( please. Anyone?! 🙏🏻👶🏽🌈💛