Does anyone have kids all healthy pregnancy then at 4th pregnancy a miscarriage....

I have 3 kids 16-12-10 yrs old....we started to ttc more than a year ago finally we got pregnant and we're so happy then at 15 weeks pregnant had a miscarriage don't know how I had no complications or never saw this coming....but I was wondering how possible is it for us to get pregnant again and not ending with a miscarriage?....

Me and my husband are very scared but at the same time we want to try ttc as soon as possible....