Are you often subjected to the whims of portals or other dimensions/timelines?
Evidence suggests - although it certainly doesn't prove anything with statistical validation - that being here doesn't actually disrupt the timeline at home, and you actually are, or will be, at home dealing with whatever comes up. Most convincingly, to me, was that my sister arrived from my future and did not remember me disappearing, which she definitely would have noticed. And I was definitely needed at home right before I got here, but being here doesn't seem to have changed anything.
All that said, it's totally fair to worry about home anyway, or to think that there's another explanation for things like that, which there totally could be.