Magic Forums

So I've been in my house for about a year, and I saw a mouse (Or what looked like a mouse at least) in my kitchen but disappear instantly. It's been a few days since I saw it last and no one else has seen it and there is no evidence of mice being in the house (Droppings, holes etc...). The funny thing is, that in the house before the one I'm in the same thing happened, and I was the only one who saw it.
Now,
I've always been superstitious about these things, so I was just wondering if seeing mice is some sort of sign or I'm just unlucky enough to see a mouse that seems to be stalking me.