thats the main thing, just calm down.
i freak out all the time, believe me, i am not so paranoid that when something happens that i dont know about it i freak out and i come here looking for advice. its been great too.
actually something recent happened, was looking at my tank one night and saw these snail/slug looking like creature and it was maybe a 1/4" long. turns out it was nothing scary, then after i made a move of the tank from savannah, i saw it again, plus like 3 more, all of them were like about a half inch long. I was in total amazement.
the moral of the story is, when in doubt, ask ARC members, they are awesome with answers.