Hi Jamie,
I have a 5 month old called Bella as well! Also slightly overshot and her left, lower jaw rolls inwards slightly so her bottom canine was growing into the roof of her mouth. We had to have it taken out by a specialist dental vet, and now that her new tooth is coming through, she will have to have some correction done on that to get it to the correct position (first of all trying to get her to bite on a kong to nudge it into the right place, but failing that she will have a bite plane fitted which is basically a doggie brace).
I'd recommend you take her to your vet and ask to be referred to a specialist dental vet who will be able to advise you.
One thing - have you got her insured? I'd highly recommend it as it's so far been nearly £900 for Bella's treatment and more to follow (luckily covered by insurance).
I think if her teeth are wonky at this stage they may well be wonky when the adult ones come through because they follow the line of the old teeth.
Good luck and let us know how you get on!