Thanx everyone for all your input.
The complete bloodwork/STD check came clean so no worries about that anymore.
As for the club, we ever went back again we will however talk to the club owners about it eventually.
Right now neither one of us feels like calling them since we feel they should've screened their members more carefully.
It might not be the textbook right thing to do but it's the way we decided to cope with it.