I just need a pep talk

I'm struggling hard.

I have a hard 5 month old with colic, acid reflux, liquid aversions, ulcers, teething, and choking issues due to aversion. He basically doesn't sleep more then 2 hours and I have to hold him.

I also have a 2 year old who is energetic and is currently sick.

I'm so burned out I am holding kids all night all day just juggling it all. Everything from keeping humidifiers clean and running to soaking toddler in a bath for his diaper rash and then jumping in the bath myself with the baby to get him relaxed. I am full time breastfeeding and I'm exhausted trying to keep up with baby's needes and also cook. Cleaning just means everyone is crying including me. I just feel like I'm failing them.

I'm just feeling so alone so exhausted and just depleted. I can't accept any outside help till the little one is feeling better. I just feel like the last 6 months have been in survival mode. I am running on empty emotionally and physically. When people ask how I am doing they respond with "you are going to miss this" totally makes me feel worse because I want to enjoy life I am just hanging by a thread. I just need to hear I'm doing good.