Heading in for tests tomorrow...

I'm taking my son in tomorrow for the MRI and bloodwork portion of testing. Clearly, I am anxious about this, but I am doing my best to not show that during the day. As a result, my anxiety pours out other places. Things seem to bother me more; I see that I'm hyper sensitive to words and actions, and all at the same time I feel like I am pushing people away without meaning to....or maybe they're pushing me away?