I cannot advise strongly enough to avoid working from home as much as possible. I have worked from home for close to 15 years, due to the nature of the job. You will find that your going out anxiety will increase the longer you work from home. You will also see "regular" anxiety increase as well as you lose social connections. I have known many who ended up becoming agoraphobic over time while working from home. Twice during the 15 years I have worked from the office for an extended amount of time (4 months and then a year and a half) and after a couple week adjustment, the anxiety almost fell away. I was a new man. I thrived. I did have to push in the beginning though.
I do think that we overthink things. While I think it is possible that soaps, perfumes, and errant crumbs could hit a person, I think it is much more likely to be that subconscious anxiety. I can be perfectly fine all week and you mention going out to eat, me coming over, or a possible date and whammo I have a "celiac reaction." I would be a lot of others are like that or were before they were able to wrap their head around things and get 100% compliant for a lengthy amount of time.
Right now you are new to the disease. Less than 6 months if my math is right. You are probably still healing and learning what your triggers are. The worst thing I ever did was get into the overthinking it phase which I bet many due at the beginning. Most likely you are discovering other food categories that bother you or maybe you have not narrowed those down yet. When the gut is off, anxiety is up. They will feed off of each other to where you will not know what is the primary cause. You may find relief from a therapist and possibly with medication, although therapy can work wonders fast.