Do you have a picture of this little guy? Sounds like it could be a phal?
What kind of fertilizer were you using? Until you feel confident, you may want to mix it on the weaker side to ensure you don't burn your orchid. I like to "feed" my orchids with a spray bottle of fertilizer after I water them.
Have you considered maybe mounting the plant on epiweb, or bark, etc? This might help prevent overwatering or having the orchid sit in water too long and rot the roots. Also with this way, you can "hang" your little orchid near a lamp or light source without taking up a windowsil. And just spray it's roots w/H2O to keep them happy.