Period changes after pregnancy????

La

I’m still BF, but only pumping now, and at best only two or three times a day. My cycle before pregnancy was 28 days, I’m on day 5 of high fertility (using clear blue advanced) so maybe solid smiley tomorrow (peak fertility) but this is putting me into the mid 30’s for length of cycle. Is this normal? Or is my body still trying to figure shit our? I’m 10 months pp.