Has Jamie always had such a prominent vein on his forehead
As I recall, SH's forehead and early season hairstyle was discussed in depth on the Outlander S2 thread and the conclusion was, he needs a fringe 
I'm ecstatic to report that his hair improves as the series goes on and by Episode 10, he's back to his gorgeous, sexy, rough and ready, kilt-attired, knee flashing self.
As for the wine, as roobix said, it was safer than the water which would have been filthy, I'd imagine.