You've certainly been thrown in the deep end, @LisaO This stuff is incredibly stressful on both a physical and emotional level and any body function that is subject to variation is likely to chuck a wobbler.
With everything happening so quickly it's hard to determine what is 'normal' and what is not. Urinary tract infections are very common, you quite possibly had a catheter in during your surgery (something that is not often disclosed if you don't ask) couple that with a low fluid intake, odd diet and, of course, stress and you can see why you are vulnerable to those sorts of bugs at that time. If you have had antibiotics you also may end up with galloping fanny itch (thrush) which makes no sense when you are obsessing about your boobs.
Give yourself some time; keep a diary so you can explain exactly what happened and when and who you told about it.
Good luck, Marg