LOST IN MINECRAFT INFINITE WORLD?

Please somebody help me
So I was building my city in Minecraft Pocket edition in an infinite world. I know that if I die I will respawn at the same spot so I made my spawn point the center of everything. Then I accidentally died just earlier and I SPAWNED AT A DIFFERENT PLACE AND I CAN't SEE MY CITY IN WHICH I HAVE INVESTED MONTHS OF MY TIME I'm CRYING Please Help No matter how many times I tried to kill myself and respawn it's never the same old spot, it's a new one now! Wht do I do? Please help I beg you anyone. There must be some kind of coordinates where my city is right? Please!