ive hit rock bottom . what a way to end the year.

on monday we started taping DD's thumb as her thumb sucking habit needed to stop, she already has some major dental issues from sucking it.
she had a day sleep monday, took around 2 hrs to go to sleep that night, slept all night.
tues no day sleep, just fluffed around, took 1 hr to go to sleep that night, slept all night.
today, day-same as yesterday, tonight took about 30 mins to go to sleep.

the sleep problems in my opinion have come from stopping the thumb sucking as its her way to self settle.

the problems im having is that last night and today/tonight she has decided to undress, wants diffferent clothes on, needs to wee etc... every stalling tactic used. im finding myself negotiating with a 2 yr old adn getting rather angry at the same time, i just want her to sleep., ive accepted the day sleep is probably over, but im sick of negotiating with her at night for clothes, shes also TT so cant denigh her the potty, this all done with a huge cheeky grin, and shes winning. im getting sooooooooo frustrated with her, i yelled badly at her tonight i did the other day too .
i really needs some help/suggestions as to how to deal with her before i completely loose the plot, which im very close to doing.

hope this makes sense, im feeling very ashamed and angry with myself. i wouldnt say this is the 'terrible two' more the 'silly two'

please help.