The days are getting harder

The days are getting harder, the house is getting messier, I'm getting crankier, I don't know how I can do 8 more weeks. I have a 2.5 year old, he is a good kid, usually compliant and fairly easy. Some days are just really hard though. He doesn't play independently very well, he is always asking me for things. I feel like my whole life lately is just taking care of everyone's requests of me. I also nanny a 14 month old, have a very high maintence dog, and work two online jobs. I don't know how I can keep this up for 8 more weeks. Feeling oretty shitty today.