Irregular periods?

Meg • Wife. Mother of a 7 year old and 3 year old. 3 MC 👼baby #3 due Dec27

My first period was april 5th. Then i had a tiny spotting 2 weeks later on the 21st and now nothing. With my last 2 kids i didnt have irregular periods once it came back. Im also exclusively breastfeeding . Should i be concerned im prego or is this normal?