High risk pregnancy?

So I had my son 15months ago via C-Section for medical reasons. I am now 4 weeks pregnant with baby #2 (planned pregnancy. We’re thrilled.) but my OB said that this is a high risk pregnancy because I didn’t wait 2 years after having my son to get pregnant again. I am now very discouraged and worried about me and my babe. (Mostly my sweet babe of course.) I’m looking for positive stories of people who have had 2 sections less than two years apart. And just some reassurance. I’m so worried. I was never told to wait 2 years.