craftgrrl | SEWING MACHINE PROBLEMS.

So the moment I fixed my sewing machine, another thing fucks up. Sighzorz.
Anyways, when I just do a normal stitch, it'll like skip a few stitches, &then stitch some, skip some, stitch some. &It's not like I'm making the stitch setting really big (erm, making the stitches really wide?), so i don't know what goes on.
Here is my lame attempt at drawing it out:

__________ _ _ _ _ ____ _ _______ _ _ _ _______ _ _ ____________ _ _ _ _ _______________________ _ _
etc, etc. Really random, really weird. &The bottom thread is all funky. Yes, I checked the bobbin, re did it, put it in several times. No bueno.
Like, the needle will go in, but the there won't be a stich, except occasionally? Does that make sense?
Do I just need a tune up?

♥
Thx loves.