Exhaustion

I feel like the worst mommy in the world tonight after a very long weekend. I'm not, I know, but I feel like it. See I work full time, take care of my son full time and have little to no "me" time. I have no family locally that I can trust to take over when I need a break and my husband has to work many weekends when I would be able to take some time to myself. So this weekend I was burnt out. I have been sick since Thursday and not feeling 100%. My son has been a little under the weather as well which makes him act out. I am literally physically and mentally exhausted. It was hard to pretend that I wanted to be "Mommy" this weekend. It was hard to play the sweet innocent games that my son likes to play. It was hard to motivate myself to do anything. So I feel guilty. I am not a bad mother - I know I'm not. I give my son 110% all of the time, even when I have to fake it. Why do I feel so guilty when I have to fake it like I did this weekend? Really I don't know that anyone has an answer, or that I am even looking for one, I just needed to vent. Now I am going to go to sleep and hope that this week things are better and I get a little break one day.