Dear Pitifulboa6, parenting is one of the toughest and most challenging jobs in this world, so be proud of yourself of taking care of not just one but two kids. I can understand, how they, being dependant on you, can completely drain you. Try taking help of family members and if they are not available hire some house maid
Also a schedule can make things manageable I think.
I am a mother and it’s a really tough job but that’s what we are good at. Initially, it was tough for me also but then maintaining a schedule really helped me and I am thankful to my In-Laws who helped me out. Why don’t you take their support!