Anxiety help!

I have pretty bad social anxiety but I need help with a certain situation. Work. I have been nannying for the same woman for 7 months now and I still get massive anxiety every morning before work. I feel nauseated, dizzy, faint, etc. I always make it to work because I'm too worried that she won't like me if I ever call out. However, I've been doing an online study course for Pharmacy Tech and within the month I plan to begin a search for a new job. The idea of searching for a new job makes me want to vomit but what I think if worse is having to tell my boss that I'm quoting and giving her a one month notice. I honestly have no idea how I am going to be able to do it. I still have a month before I even need to say anything but I'm killing myself worrying about it. I really need advice.