If your weather is like ours then I don't blame you for not wanting to go out!
Sounds like you need to talk to those around you more about how you are actually feeling. I know that Marc and I have developed a system so if he feels that he needs to get out of the shop etc he'll tell me, I'll cut it short and pay and follow him out... But we do the majority of our shopping online so we don't have to deal with supermarkets which can be a massive trigger for his anxiety etc