Longer period with the implant

Bri

I just got the implant inserted on April 18th. My period started on May 6th and is not showing signs of stopping. its been only a week, but my normal period lasts usually between 3-5 days. I know that the implant can and will make my period irregular for the first few months, but how long can my period actually last on the implant? I’ve heard women say that they had their period for 3 months straight when they inserted the implant.