I have to agree, your DH sounds a bit overly cautious! Nice of him to be concerned but surely flipping out over an umbrella mocktail with good friends is a bit over the top?
I'm 39 + 1 and haven't confined myself to the house yet... I'm still driving, shopping etc etc although it is all becoming a bit more difficult as I haul my enormous self around. Should I not be driving? I don't know... no-one has told me to stop yet although I realise there are risks... Yesterday I drove half an hour away to attend a friend's baby shower and had a lovely time - I don't think you should deprive yourself of a social life just because you're pregnant. If you feel well and have enough energy then go for it