Well the dream journal is for helping you improve recall and noticing dream signs. So if you can remember some basic stuff about those lost dreams you can just note them in your new dream journal and go from there.

It's not really a loss because it still helped you on your way to developing recall which is the purpose.

Like anything, if you really want to do it, you will...if you don't, you won't.

So if you really want get back into it just chalk it up to bad luck and remind yourself that was then and this is now.

Good Luck!