You not having a schematic is not as much a problem in getting help, it's as much a problem for YOU understanding your own circuit and knowing whether it's all wired correctly, and being able to easily check what is supposed to be wired where.
Then the best you can do now is write a simple test script that just reads those sensors and prints the data to the serial monitor. See whether that works. If that works, there's likely a problem in your main project code. If that doesn't work, there's likely a problem in your wiring.