How to not worry: suggestions requested ASAP!

OK, all you nonworriers, give me your best tips!  My older daughter is in trouble at college, a second time that she has messed up and alcohol has been involved.  I will leave out the gory (actually, kind of funny and pathetic) details.  Anyway, how do I, nonADHD parent and spouse, slow down my heart; keep my stomach from roiling; and generally calm my mind to a reasonable extent until Monday, when dear daughter meets with the school's conduct officer?  I have given my daughter good advice, I think, about how to respond:  get help for her alcohol problem!  But I have a feeling that in a few hours, I"m going to crash and have my PTSD-like response of intense (and pointless, I know) worrying.