caemgel

Anybody know anything about dogs?
So I have the cutest valhund pup. She is almost 2 years old and in great shape physically except for an overbite.  There are two issues that I only bring up together cause I am wondering if they might be related. 
The first is that she seems really neruotic.  Nervous all the time.I think her newest thing is trying death by owner.  She keeps walking up under my feet as I am walking just perfectly so that she trips me and I fall on her before I even realize she is there.  So far I have done good not to actually land on her, but I am worried that sooner or later my luck will run out.  Then she runs over to a corner and slinks about giving me a look like I chased her down and kicked her for no reason.  This goes with a lot of licking - anything and everything and virtually all the time in what is looking more and more like a nervous habit more than anything else. 
At first I thought the active tongue was just the overbite irritating her. But up to and including her last checkup (just shy of two months ago)  the vet saw no signs of irritations and didn't think it was causing her pain.  So we opted to not interfere with it.  But she is playing with her food more before she eats it and playing with her mouth more.
So I realize that there is a problem, I am just not sure if it is a physical issue primarily and needs medical help first; or if it is an emotional issue that I need to figure out how to soothe. 
I am wondering if anybody has had an experience or any ideas on how to differentiate this for me?  I dont want to put her through an expensive and probably painful ordeal if that isn't the source of the problem, but I am also not sure why she is so insecure all the time, or what to do about it.

so i am trying to fight back the jungle that is my yard and losing.  the lawn mower has gas, oil, clear blades and a brand new spark plug and still not turning on.  no matter how i squeeze and tug and pull and curse and jump around it wont come on.  my dog thinks i have officially lost it.  and i am not sure if she is entirely wrong. 
i dont want Dan to come home and need a machette to get through the yard, but we are closing in on that being a possibility.  i am going to have to get some cash and find someone to do it for me, or find a neighbor i can borrow a mower from.  i dont really know any of them enough to just knock on doors...but i am getting close, especially if no young kid knocks on my door in the next day or two looking for summer cash. 

when you turn on the radio to dance with the 11 month old - cause he loves music and maintains attention for about two songs of bouncing, laughing, and stomping, which is baby equivilant of dancing - and he stops dancing and gives you a look that says "what is wrong with YOU mom?"  look it is official:  you have exceeded your spaz quotient for the day. 

the point of course being that i dont care; i am having much fun with just me and the boy (and yes the neurotic puppy too)