Life has never been more stressful,

This week is one of the most crucial weeks in my career, and the stress is bleeding into my life.  
I have consistent anxiety dreams/nightmares, I jump myself awake at night, feet increasing shame in the most basic social interactions, it's hard for my fiance to talk to me and vice versa. I break down an cry over the simplest of sad thoughts. I'm increasingly worried about getting sick covid, flu, or just a cold.   
I've tried to eat healthier, I am going to the gym more, and I am not drinking.   
I'm undiagnosed anxiety, but my family has a history of it. Not sure what more on my own I can do. It's getting harder to deal with every day.