Rainbow baby?

Jessica

Can some one plz explain what a rainbow baby is?

I am new to technolohy and apps. I have struggled with fertility issues my entire life. PCOS esting disorders and drugs have ran rampant. Been sober for 8 years i met an amazing man who is good to me. Tracked my cycle using glow and just found out i an almost 6 weeks pregnant.

I am extremely excited and scared and nervous. Any advice???