Take a deep breath, take a step and observe you fish.
If you have ich then the early stages are fish scratching on anything they can find, even if they do it once every few hours.
Advanced ich u will notice white salt like spots.
Don't panic, you will need a 10 gallon fish tank, filter, heater.
Get Cupramine, 34 drops in a 10 gallon tank added over a 2 day period, leave fish in that tank for 3 weeks.
If its ich and the fish are still eating then u will save them.
If its ich and the fish are not eating, are lethargic, withdrawn then chances are lower.
Observe your fish before taking any course of action.