Hello, how many days did your lochia last?

Hello, how many days did your lochia last? My son had 40 days, with my daughter it's already short, she only gets them painted now, after I plan to go for an ultrasound, just normal is that fast After giving birth, there were 3-4 days of postpartum contractions, the gynecologist checked in the hospital on the third day, everything was fine, no pain