Exclusively breastfeeding weight loss

So I haven’t lost any weight since the initial weight I lost leaving the hospital. I’m almost 10 weeks pp and i still have 23 lbs to lose I only lost 13 lbs 7lbs was baby and I’m assuming the rest was placenta etc. I’ve read online that when breastfeeding there’s a significant amount of weight lost between 3-6 months. Is there any truth to this? I also saw that after getting you first pp period there’s also weight loss? I’m stressing out. I walk every day and watch what I eat but i haven’t lost a single pound since living the hospital.