I have had my plant for about 3-4 weeks, it has bloomed nicely, but I took a look at the roots today and they were all black and squishy, so I cut the dead part of and put some mulch at the bottom of my clay pot (one singe hole at the bottom) and took it out of it's plastic hold (It was a gift and possibly store bought). I think I over-watered it... What should I do?