Implantation bleeding?

Brittney • 10 year old boy and 2 year old girl 🖤
I've been spotting lightly the last 3 days.. it finally stopped tonight. When would you ladies recommend me take a test? I haven't had a normal cycle since I got my mirena removed a year ago so I don't know when I should be expecting my next period.. but I KNOW this wasn't a period.