oh poor you. Things seem 10 times worse when you havent had a good nights sleep
You mention in your post that for the last 2 weeks that the problem has got worse - is this due to the holidays ? Has something changed ?
Personally I wouldnt have ours in our bed, only because I am sure that I would just have a chapped face in the morning from all the cocker licks

but I know that plenty of members do have theirs on the bed, if it works for them then thats fine.
I would take Holly out for a good walk about an hour behalf bedtime and have quiet time with her after that. Perhaps try her bed on the landing with the baby gate on your bedroom door and see how that goes, slowly then move the gate to the landing, this might work.
Not sure from your post, whether she is getting stressed during the day, if she is, you need to go right back to basics and try leaving her for 5 mins and steadily increasing it, use the baby gate again so that she can still see you.
I know that it is difficult and this is not an overnight cure, it does take time. Make sure that OH is onside because you both need to be firm and on the same side.
Good luck
p.s. do a search on other postings because this has been covered loads of times so there will be loads more tips