biting in bed

Hi all;
I dont really know if I should post this in here, or in breastfeeding, because I think it fits in both but herre will do.. Please move though if it isnt in the right spot!

So dd is 13 months old and i still breastfeed her. She also shares our bed once we go to bed.
Up until last month everything was fine, but in the last month she has got her top eye and molar teeth, and is now showing signs of getting her bottom ones through!

Up until this bour of teething she would wake me at night if she wanted a feed, i would roll over, feed her and go back to sleep.
However now she has decided that she doesnt need to wake me, and that she can find it all by herself!
Problem is is that everytime she does this, she bites me really really hard.
To mak things worse I always sleep in pjs, and have always lifted my top when she wants a feed; but now she tries to go straight through my shirt, and when she realises that something is in her way she bites down and bites harder and harder until she gets what she wants!!!!! And then we're both in tears in the middle of the night!
I dont know what to do; At the moment I sleep with my back to her, or on my back; and its to the point now that I am scared to feed her over night.
We love co-sleeping but this is really dampening the experience!

Any ideas on what i can do?:pray::pray: