Update:

So after much discussions with me band mates it seems I haven't quit!! They've really gone out of their way to accomodate me, reducing the number of gigs and even getting in a 'stand-by' guy to cover any gigs that I can't make.

I guess I'm flattered, they really want me as their guitarist.

My family life has settled down a bit now too, my daughter (now 5months) is much better and easier to take care of (most of the uncontrollable crying has stopped).

So next Friday evening I'll be back tearing it up at a big charity gig, looking forward to it now