IVF Cycle 2 Frozen Embryo Transfer

Hi Ladies,
I'm about to start my second ivf cycle. This is a frozen embryo transfer. Sorry still picking up the IVF lingo. Our first one was successful but we lost very soon after we received our good news. 
I am fearful that mAy have done something wrong. Even though my doctor assures me I haven't. Still can't help myself and wonder why. The series of whys during this whole experience. 
I have three embryos frozen. My husband and I are considering all 3 transferred.  Anyone with experiences and advice when making this decision. Also what did you do after your transfer as far as activities?  Did it factor in anything?