Well they took her in for the day to monitor her because she had a high temperature as well, they took samples and they said it is just a heavy heat, but it may go on for yet another 3 weeks.
So the vet said it would be best to just get her desexed today, so we did. Poor puppy has been sooking all evening and cant walk. but they said she'll be fine now, she just needed extra drugs because she was on heat.
Thanks for all your help, Im glad I took her in as even the vet was a bit concerned about her. Hopefully she will recover okay.