[laristotle]

1st string has gotten bad especially on the 5th, 14th and 15th frets

Is it possible that some of the frets have actually lifted a little bit?

If you have a short straight edge, lay it on those frets and see if it 'rocks' back and forth.
It'll help to identify which frets are high, if that's the problem.

Lado Hawk? or copy?

 

[laristotle]

If the ruler doesn’t rock across those frets, what do I do next? Should I raise the action in the high end of the bridge a hair?

That tells you that there's no high fret in that area. Move along above/below that area with your straight edge to make sure that other frets arn't the problem.
Raise the strings until it doesn't buzz.

How's the relief (up bow) on it now?
Capo, or fret the low 'E' string at the first fret (nut side) and hold down the string at the 14th.
There should be a small gap of around .2 - .5 mm (credit card) between the top of the 8th fret and the bottom of the string.
That would be proper relief.

 

[laristotle]

(maybe to do with the weather change?)

There's been warm/cold alternating days these past coupla' weeks. Wait till the weather stabilizes?

 

[laristotle]

Could my neck be twisted?!!??

Eye ball it down the length of the neck. You'd see it if it was.
Also, it would affect more than the one string.