I hope you start to feel less overwhelmed Katie. You definitely have to say no sometimes. And you need a break from overwork. I have recently been put in sort of the same position at my job. I usually work very quickly and get everything done in a short period of time. But now that i am shouldering my own job and 3 others, i've slowed down a little to make it seem less hectic. I also take a few breaks and take walks so i have a few minutes to let my mind calm down. I know its hard to say no at work, but sometimes its our only option. Stay strong!!