This may be because you opened a portal, went to the nether, and created ANOTHER portal to get out of there. if that is so, then you have gone a large distance from yuor house by traveling in thr Nether. If your house has a beacon, try searching for that. Try looking for tell-tale landmarks such as torches you’ve left or a certain landscape that you’ve seen before. That should lead you there. If not, try going back to the nether, and back to the ORIGINAL portal that got you there, from near/in your house. OR: You can always open your world to LAN, which will enable you to do a simple cheat for flying, and you can locate your house easily enough. I don’t know exactly how to do that, seeing as I tend to stick to non-cheating as much as possible. But it’s easy enough, and you should find your house. You can opt to get out of LAN and cheating-mode after you find your base. Hope this helps J