Miscarriage at a young age

Two years ago I found out I was pregnant after the father and I had broken up and I hadn’t told him because I didn’t think he would want anything to do with it. Not too long after I had a miscarriage at 12 weeks. We recently reconnected and I told him about everything and i was wrong. He loved me so much and would’ve been there through everything. he feels awful for not being there even though he didn’t know. Sometimes I get sad about the miscarriage still and feel as if I shouldn’t because I was young, early in the pregnancy and it just wasn’t meant to be. I have endometriosis and PCOS and have been told having children isn’t in the cards for me so the loss of that baby was very tragic for me as I don’t know if I’ll ever have the chance to have another. I know god always has a plan but sometimes I wish I had someone to talk to about it because nobody around me really understands how it feels to experience a loss like that. I’m only 21. Am I crazy for wanting another baby?