Periods stopped???

I have one son. He is 20 months old. Since I’ve had him, I’ve had maybe 7 cycles.

Ovia recorded my periods automatically so I’m unsure when my last period was, other than it’s been over 8 months since I’ve had one.

I was breast feeding only once or twice a day until a week ago. Now my son is weaned.

When should my periods start back? :( it’s got me worried.