First period since giving birth

RR • Together since 2009 | Married since 2014 | 3 M/C`s | MTHFR | Rainbow baby born 07/02/17💗 #2 Due 12/21/20!!

I exclusively breast fed for 12.5 months and just got my period 14.5 months postpartum. It’s so heavy. I’m soaking through a tampon every hour or less and I’ve doubled down with a pad.

Is this normal? Calling my OB today but wanted to see what you mama’s have experienced.