My first time I was positive it would work and was really upset when it didn't. The next couple I didn't want to let myself get too sure of anything. My husband is of the opinion that positive thinking is the way to go - which gets pretty frustrating when I start feeling things aren't working! I'm (hopefully) having a transfer tomorrow - fingers crossed one thaws ok - and I know that I'm not going to be able to concentrate on anything else for the next two weeks!