Struggling with Agoraphobia: Feeling Alone and Ashamed

My agoraphobia is getting much worse, some weeks worse than others. I find it hard to do simple activities I did years before, like going to restaurants or on small trips. I told my partner tonight I couldn’t go to dinner with him for his birthday because I was fighting a panic attack. I feel so ashamed and apologetic. The last time I went on a vacation I had a major panic attack in the car in front of my partner’s family and it was humiliating. I recovered after the trip, but it’s still haunting. I am in this alone since my partner doesn’t understand my condition. I can’t find a therapist that accepts my insurance, yet. I am so anxious to go anywhere besides the few stores I am comfortable at, like the book store and craft store. Going out for more than a few hours is hard, so I am working from home. I have no idea what to do, I’d like to hear from the community. Thank you.