My roommates mom gave me this orange tree but I wasn't ready to plant it because I will probably move within a year and I want to keep the plant. So I put it in a pot with citrus fertilizer, also some regular fertilizer on the top because it didn't fill as far as it needed to. The leaves started curling in the last few days and turning brown. The branches were green, last night so I wasn't as concerned but now they are turning brown too. I live in Phoenix and there have been a few freezing nights but that was before I potted and the tree was ok, up to that point, though perhaps I am too novice to notice. I think I might have over watered it after potting but I haven't watered it since Monday though it did rain Tuesday it is under a hanging so it shouldn't have gotten to wet. The soil is still wet from that though I'm not sure if it's wet all the way through. I feel really bad for the little guy can I save?