*Update* Am I "too skinny"?

Ok so I know this post is going to sound dumb, but I've lost a decent amount of weight after breastfeeding my son for 18 months. I stopped in April. I didnt diet or anything, just ate healthier and exercised. Today my boyfriends mom was all like "you've gotten skinny". And I took it as a compliment and was all like "thankyou!". Then she was all like, "no... not thank you. You're looking *too* skinny". So I was confused and proceeded to tell her I weighed 126 pounds and I'm at a healthy weight for my height then she started laughing. I was telling her how I actually weighed 104lbs in high school and that's still considered a healthy weight for my height. I was confused. I looked like this back in April. I am 5'2" and I was around 149-152lbs in this picture:

I just took this picture today. I am 126lbs:

I already have body related issues so now I actually dont know if I look too skinny or if I look normal. I'm not too skinny right? I dont think I am. I do actually want to lose a few more pounds though, but mostly because my arms are a little flabby. Thank you :)

**Guys thank you so much for all of your comments! 😭💕. I tried to reply to all of them, but theres just so much love I couldn't! I did not expect this much of a response. You're all amazing and made me feel so much better about myself I cant even describe it. 💕 thanks to each and every one of you that took the time to write me a comment, I really appreciate it and read every single one💗💗💗 you are all beautiful ladies**