Period returned after 1 year

H

Sooo I didn’t have a period for one whole year. The first 3 months were like.. ok but 5 months moths came and than 6 months came and I than I started to get scared. I tested ALOTTTTTT and it cane back negative 😔 I took all kinds of test and Drs so I was normal. So I was left like .. so what’s happening with my body?! A years time passed an still nothing 😟 than 2 more week passed and I noticed spotting and then ire enough the flow came and I finally had a period. 🤗🤗🤗 it went on for almost 3 weeks and not it stopped.

Idk why happened but h anyone else experienced this??