Thanks for the replies guys, to be honest, I know none of them would have cared if I'd chosen not to drink so I'm still confused as to why I did it considering how bad I feel today... The moment I took the drink, the first sip, was like I was on auto pilot with no control, really really scary... I hadn't planned it, it just happened, even though the night before I'd been thinking about how strong I have been in my recovery so far.. I'm not going to disregard these last 5 months for the sake of three beers. Today is a new day . No withdrawals at least, which is what got me into the sane drinking in the first place, so don't need to worry about that.
If you're thinking of drinking again, all I can say is: you do NOT want to be in my position now. Drinking is absolutely pathetic and I feel pathetic for having par taken in it again..