Congested 3 week old!!! Help!

I've tried it all basically, steam from hot shower, saline drops, frida nose sucker... Nothing helps this poor baby! Going to pediatrician tomorrow to rule out any illness. He does not have a high temp. During the day he was fine, this all started last night. So going into the day time the congestion went away, came back as soon as we went back in our bedroom at night and he sounds like he is snorting again. Can't see any visible snot or boogies. What do i do next?!?!