I Have Anxiety

So, living in the PNW, I've developed seasonal depression and extreme anxiety. Looks like my trigger is whenever my husband and I have a fight. Holy crap, it's so bad. All I can think is there is something wrong. Every little thing, I over think and it makes me sick. Utterly sick to my stomach. I feel like this is going to be a never ending loop. The worst part is, I don't know how to get my head above water.