I am the same, the twinges are wierd but on the other hand I am currently also worried at my lack of symptoms (I know people will be cursing me now for complaining about this) but I feel pretty much fine and have only occassional subtle nausea or tiredness so far. hopefully it's just too early, but I feel as though I'd find it more reassuring if I was throwing up all the time - it's like I'd know I was definately pregnant!
As for the sex of the baby - I definately want to know - I'm so anal I like to know everything that's going on with no surprises! It is driving me crazy having to wait until 12 weeks to find out if everything is really in there and OK!