ugh tired!

I work full time night shift, 11-7am. My boyfriend works 8-6pm everyday. He watches my son at night when I am at work then I watch him during the day. My boyfriend and I don't live together and is not my sons father. I cannot afford a babysitter since I get no help from my sons dad. He disappeared. 
So I get about 2 hours of sleep a day. My son is two and doesn't take a nap. Gets up at 7:30, and goes to bed about 9:30pm. 
Any help on how I could manage to feel a little more awake lol? I've been doing this two years and I'm literally dying. Any help?