hey my teeth are loose what should i do?!

well they arent LOOSE but im not used to feeling that little click and i tried to wiggle it barely moves its just when i run my tongue over it i feel it click theres no pain. There is a number of things that could cause it. I just started using a night guard it makes my gums swell, could that just be making my gum soft to the point my too clicks a tiny bit but i cant wiggle it or pull it any which way they are still in there pretty tight. I also had very chewy foods yesterday (tough meat) could it had been that? Also i am brushing and flossing alot more maybe my mouth just isnt used to it? I have no pain or nothing just that tiny click when my tongue glides over it and im scared to death i dont want my teeth falling out. My nurse said its normal for teeth to click as long as its not wiggly like its about to fall out and it should go away in a few days my teeth probably just arent used to all the stress I have put on them lately the changes. Should i be worried? I keep getting paranoid and pushing my tongue against it to make sure it hasnt fallen out. But then again i worry about the tiniest stuff that is compeletly normal.