home and into confusion

Vacation is supposed to be a time to relax.  Not so with me this time.  I received a life changing call the day before I took my vacation... my job is changing. I could have said no.  I didn't.  I'm taking a leap.  I'm going to give it a try but it will change everything.  There will be weeks I am not home.  This means Tim will be the lead.  I know he can do it... but we are supposed to be a team and I feel like I won't be pulling my weight.  The only other option is to be unemployed and HOPE that I can get something.  I can't do that.  So I opted for change.  Now my heart  is heavy with worry and anxiety. I want to try this ... I know I can be good at it. But I feel selfish.