How to get through the wait?

I am waiting on an appointment at the breast clinic in 1 1/2 weeks. Having put off seeking help, I am now convinced it's going to be bad news. This wait is agonising. I've since done more research on my symptoms and am kicking myself for not getting checked out sooner. I'm worried that if they do find anything it's going to be much more advanced and it will be my fault, but I can't change time now. I have a 2 1/2 year old and it's unbearable to think of not being around for him growing up. I know I'm jumping to all the worst conclusions here, and I should take it a day at a time, wait and see etc but my worrying is getting a bit out of control and I have another week to somehow get through!