Hi!
Zefi said this is something I might be able to help with. I'll toss out a few ideas and let you take it from there if you like.
>>One thing I noticed ... it seemed like she was in a bad mood with me. I can't quite explain it but I just felt it a lot. Now that I have brought her back home, I can see that she is still moody somewhat. I actually noticed this before she fell ill.>>
I'm guessing she is a puppy since she is having vaccinations. My first thought on this, all things being equal, is that she is no longer a baby puppy, ie, under 4 months. (I'm American and not used to the Ozzie designation for shows!)
If so, she's not in a bad mood with you, she's just growing up. If you've been indulging her every whim, I could see where she might be getting crabby if you had the nerve to set a boundary or two, though.

The fact you are studying for exams could be a trigger too -- first she was the center of your life and suddenly there is something else on your mind.
Tough. Life happens. She needs to understand that Life does indeed happen. Just like a little kid, she will learn the whole world does not revolve around her. Don't feel guilty either! Kids and dogs do better with clear boundaries and guidance.
>>at night she just cries and cries and cries. >>>
Yep she will. And if you give in and let her sleep with you it ain't gonna get better. Exams or no, she has to sleep where you want her to. Consider it practice for having a baby! LOL
If you won't give in, she will give up within a week, right around the end of exams. Now you can be exhausted and cranky just like a real mom.
When I give her attention she is a bit unreceptive and looks the other way (which I know is quite bad in dog language)>>
Not necessarily! It could easily mean she is apprehensive. Does she lookaway, liplick, turn her back? Those are all signs of mild discomfort, not brattiness. She is trying to calm herself and you.
Give her attention by sitting quietly with her. when she notices you, light up like a lightning bug with a smile and a QUIET "Bamse" -- and offer her a tiny treat like boiled chicken or cheese. Repeat until she is happily looking at you. Stop.
Should take about 5-10 mins the first time, much less on subsequent times. Relax. Calm, center, focus. Meditate on "Bamse looking at me." LOL If you get short-tempered, stop and only begin again when you can be calm.
>>if I leave her alone and do my own thing, she instantly comes to see what I am doing >>
Ummm. You ever seen a little kid tugging at Mom's sleeve, going Mommy/Mommy/Mommy? grrr. They do it to annoy. I swear!

signed, mother of two and grandmother of four.
Seriously, kids and dogs do have a lot in common. Moms should have similar things in common: patience, consistency, clear goals. I strongly suspect she isn't old enough to be running around the house unsupervised, so crate or pen her with a nice toy and juicy bone when you can't play with her. Set short times (5-15 minutes) once or twice a day where you devote time to her training and socialization. Get her lots of exercise, since a tired dog is a good dog. Teach her lots of stuff ranging from basic manners to tricks so she doesn't get bored.
>>I don't want to upset her at this early stage.>>
<smothered laughter> This is when I like to traumatize them judiciously as much as possible. I AM the guide, I LOVE it when you show confidence in public, I IGNORE your fear (assuming there's nothing to fear of course!) and encourage your appropriate behavior by marking it with praise/food, etc. You notice it's all about me. Humans must lead, dogs must follow in this society. That's just the way it is.
If you baby them, they will act like babies. If you guide them to adulthood, they will become responsible adults. Don't worry too much about their inner traumas, as they won't have too many -- and a little trauma only stiffens the psyche, not tramples it. If you do the best *you* can, your dog will turn out okay.
Katherine Bryce
The Family Dog
Santa Fe NM USA