Please Help Me!!

I am a 31 year old mom to 3 healthy children.  In general I fairly healthy, I had my tonsil out as a child, healthy pregnancies, rarely drink, no smoking/drug use.  i take zyrtec for allergies, multivitamin, and synthroid for a thyroid goiter.  This past fall I was bitten by a stray cat, yes I know how this sounds, and had to have a tetnus booster and was given augmentin.  During bloodwork my liver enzymes became elevated with my alt going over 100..  This past week I was being cleared for a d/c and my primary care md told me my liver is enlarged, I have no pain or tenderness, good appetite, and on top of all my liver enzymes are normal now.  I am scheduled for an ultrasound, should I be worried?  I have no idea what to think, and I will admit I am one of those that jumps to conclusions so my mind is already throwing around the c word, please help.