Hi, try not to worry
I'm sure she's fine. If your vet thinks she is ok and she's acting fine, then she's probably perfectly healthy
I have two girls. The one is 2 lbs. fullgrown at almost 2 years. I didn't get her until she was close to 1 yr. old and she weighed 1 lb 8 or 9 oz. She eats like a piggy also and is still only weighing 2 lbs. Some just stay tiny and yes they absolutely make you worry
Your little one is still so young and could have a few growth spurts yet. My other yorkie I think up to 4 months stayed at 2 lbs. and then all of a sudden had two growth spurts. The breeder told me she was going to be 5-6 lbs. and I honestly didn't think it was going to happen. Well, she's 1 yr and almost 5 mths. now and weighs 5 lbs.
Try not to worry, your doing everything right
