I just found out that my girl friend of 6 months had 2 one night stands with a couple of guy 'friends' of hers within a week of just meeting me. Question 1: Would that make you wonder if she was a loose and should I be concerned

No, not really. A lot of women have "friends with benefits" in between relationships. They're just not as talkitive about it as guys are. Guys will tell the whole world who they're sleeping with, and possibly some people they're not sleeping with.

And just because she had sex with other guys before your relationship (she didn't tell you that you were her first, right?) doesn't mean she'll have sex with other guys now that she's with you. You might even take it as a compliment; that you satisfy her better than two men!

The choice is yours