for the smell to your discharge, it sounds like an infection of some sort, ie. yeast / urinary/ vaginal of some sort. i would ask the doc to check you over. are you having much sex? the pink discharge may be due to that, your cervix can be prone to bleeds now you are pregnant. i would speak to your doc in case theyre bot related or something that needs treatment
Implanting is over and done now so I'm not really sure why they said that. I would ask to be checked for a UTI you may have a bladder infection that is causing this. That's the only thing I can think of. Sorry I can't be of more help. I also would ask from then to figure out what's going on pink is usually blood and I'd insist on them finding out where the blood is coming from.
the higher amount of discharge is normal, helps keeps your PH level at a good spot to prevent infection etc. I hav the same and its been quite a lot. as for the odor i have a an odor to mine as well, TMI but mine tends to smell like a pineapple smell