Think my plant is dieing.

Dont understand whats going on. anyone got any suggestions

What's your soil?
What liquid ferts have you been giving?

My first guess is phosphorous problems - probably deficiency, maybe from not enough, maybe from poor conditions or too much of other nutrients blocking its absorption.

Have been using usnig fox farm trio plus calc mg and bud candy. soil from ace hardware i put the perlite in it. gave it water for a week then just now gave it calc mg and some nitrogen.

Should i put it in a bigger pot with more new soil? i did have it by the window a couple days and it was cold outside,

Hmmm maybe - without knowing what her nute issue is, not wanting to add more of the wrong chemical, adding more soil is probably the gentlest and safest way to give her a nutes supplement.