6 months post birth, formula feeding, no period

[WhateverIsGood]

Hi all.

My baby was born in July and is almost 6 months old. I mix fed for 4 months, and then fed her exclusively on formula.

My period randomly came back in September (it lasted about 10 days), but hasn't come back at all since.

Is this normal or should I be concerned?

Id say it is fine if you've only stopped all feeds 2 months ago. I'd leave it another couple of months and see if they settle down. It can often take a few months to return to full fertility.