Just because your routine changes doesn't mean that has to put an end to your progress.
You can fit exercise into your new routine, you just need to dedicate some time to figuring out the best schedule. Right down how all the hours in your day are spent and you'll see you DO have time for exercise, just maybe not in the same times as before. Also, you can do exercise just about anywhere, even if you work inside an office. You can go to restroom, drink water, basically, get up for a variety of reasons sporadically and you squeeze in some pretty good cardio this way.
At your house, you can do a lot of exercise too.
About you staying at home a lot, this seems like a choice you've made. What is your disability? If its not something that impairs you from *walking* outside, then you have no excuse for staying inside the house. Alone or not, you can do a lot of activities to help you out with your anxiety. You can catch up on literature. You can rehearse speeches; even though you are alone, picture an audience and you'll see if you do this vividly enough, it feels like the real thing. You may start to get a bit of anxiety, and when this happens, use the tools you've learned to combat the feelings.
If you can walk out of the house. Go to public places and just randomly talk to people. Basically, socialize. Do things OUT of your comfort area.