Liver function tests

My infusion nurse told me today that my liver function test was elevated. I had my 4th A/C treatment and will start weekly taxol/herceptin in 3weeks for 12 weeks.
any one have this happen to them, basically is this liver mets and she isn't telling me?
can drinking alcohol cause this test to go up? my onc allows me to drink 1 drink a day. never have alcohol day before treatment.
thanks for your help, the paranoia is creeping in again.
Stage 1, sentinal node negative, er-pr-her2+++.