Ok so today I was at my cousins house an I saw balloons in his room and I don't know how old they were but they weren't floating and were on the floor so I got all of them and I sucked the helium out of 1 then another and I did like 4 or 5 some didn't work so I was wondering can me doing this cause any health problems and dieses in the future I know sucking this is in makes your oxygen go down and you can callapse but I didn't callapse or die so later on can I have health problems help please