Changing the water doesn't affect the cycle, it only dilutes the mild pollutants the filter cannot break down, nitrate, posphate etc. I would do a 50% water change soon, make sure it's similar temp, similar pH, and then just wait and see. If your filter had only just cycled then it probably wasn't strong enough to take being stopped for a while.
I'm sorry about your losses, and hope you can keep going.
I'm sorry about your losses, and hope you can keep going.