While Breastfeeding Did you...?!!!😰

Hello to all mommies out there who have breastfeed! 
I'm a FTM and since the beginning of my pregnancy I lost about 20lbs I've only gained 10 in my third trimester. Overall I've been very thin/skinny just belly throughout my whole pregnancy. I've never been this skinny which is scary to me, my main goal is to gain weight to gain all I've lost and more, my normal weight is usually between 120 to 125 and I'm 5'5 tall. 
I'm not sure if some are just being negative or trying to put me down more but they tell stuff like, breastfeeding will be the death of you or like, your never going to gain your weight back or your going to end up all bones with breastfeeding.. 😔
No one has told me anything positive for most part..
My question and concern is...
That I really want to breastfeed but another part of me is also very worried that I will end up so unhealthy because I'll loose so much weight again and ever since I lost weight I've been very delicate health wise. 
Anyone who can relate to me please share your story or anyone who can give me tips on how not to loose weight while breastfeeding, the only thing I know is that I have to eat more but my appetite is not like it used to be before pregnancy. Any other alternatives please add them. 
Thank you! X ❤️

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