Hello ladies! I'm sorry this will be long ☹️

I feel like my topic is complicated and I'm hoping I can get support here through you guys, those who will understand me or are going through something similar.

So I have a 8 month old and I'm a single mom because my partner died when I was just a few weeks, he didn't even get to know I was pregnant sadly. Well all my life I've had a very small circle and I've never really grew up with my family, so as for that I feel I don't have any support unfortunately. Ever since i was pregnant I experienced the most horrible things as in symptoms, I would throw up crazy until my last day I gave birth. My problem is I lost 45 lbs and I'm now at 98. All my life I've been 130ish 140ish around there. I'm 5'6 and 26 years old. I've never been skinny like this to the point I see my bones in my wrists and shoulders and knee bones. My legs went from muscle to stick legs. Since my son was born Ive took en care of him all by myself until now, I feed him I bath him I do it all on my own. They told me I'd gain weight again and be healthy again but not long ago I had a consultation with a new doctor and he said that he had to be honest and said that my baby is like cardio for me, I have him 24/7 and I'm skinny and he's getting very heavy, I get so exhausted and sometimes don't have the chance to eat right, he's the cause of my unhealthy lifestyle it's so sad but the doctor is so right now other people are telling me the same thing. I really need help and ADVICE more then anything in what can I do, I want to be healthy again because I'm suffering so much becoming skinnier day by day, I'm scared I'm going to leave my son without a mom one day and I'm everything to him, mom & dad, he's my only motivation in life but also has become my problem 😔💔

Please girls help me!