I do not want to start a huge discussion again, but the advice from the Goats Veterinary Association is to not use Heptavac P+ on goats - their immune systems are not very good at handling this large number of vaccines in one shot. Lambivac is recommended, and if there is a herd problem with pasteurella, than a separate pasteurella vaccine should be applied in between the two Lambivac initial doses.
I know there are lot of people swearing that ONLY Heptavac will give their goats the full protection, but there is not enough statistical evidence to point to either of the two being better than the other. However a lot of "anecdotal evidence from individual goat keepers" will be available one way or the other... I am with my vet and the GVA on this one, and use Lambivac on the goats and Heptavac on the sheep/lambs. So far no problems.
Also goats do have off-days just like humans, a little ivy/willow, bananas, toast (maybe with some Marmite if you can stand the smell of it) will often do wonders - but make sure their droppings are not loose (worms or overeating/eating something not agreeable to them for example), they are not shivering and check her temperature. Some warm water with treacle or honey in it is also welcome and may keep her hydrated if she is not keen to drink. If she is not better by Monday I would pop her into a trailer and take her to the vets to make sure. If nothing obvious he will give her a shot of antibiotics and maybe an anti-inflammatory, possibly some painkillers if he thinks she is in pain. Goats need lots of TLC to get over any kind of disease - imagined or real....