Phalaenopsis orchid care?

My husband bought me an orchid for Valentine's day. When buying, he called around to florists o see if any of them had a mature orchid. He knows that I kill every plant I have, which is why he got me a mature plant. It has 3 full grown leaves, and a new leaf sprouting. It has 2 long (spikes?) branches, with about 3 or 4 more spikes coming off of those. It is not blooming anymore. I have no idea how to care for it. I'm not sure what to repot it with. I've seen Miracle Gro for orchids, I've heard moss and bark also. The plant is not dying, so I guess I must be doing something right. I'm not sure how to cut the spikes down, or where to even do that. Please help!