Hmmm....Ok. If she thinks it's a bug I would suggest you go back as soon as you can, I mean if it gets worse over the weekend, go back immediately to out of hours, but she shouldn't be leaving it without testing you for infection.
Clostridium is unusual but it happens after antibiotic use, due to the good bugs being killed off and these ones being resistant, so they overpopulate and start attacking the bowel.
If it is suspected it needs to be tested for and treated asap.
It's notoriously hard to find in a sample so you ideally will want to do three, and keep the refrigerated till they are sent off to the lab - we live by the hospital so it was easy for me to pop over to pathology and tell them to put it in their fridge, rather than mine 
If you are unlucky and do have something like that, it will be treated with another antibiotic. It's also very common for small babies to carry it in their stools so possible to be exposed to it via your little one maybe.
Don't worry, it does eventually go away but you'll want to have it treated.
Hopefully it's not this, but Iwanted to make sure you know to go back and insist on being tested due to your recent history of a-bs.
Good luck, hope it improves over the weekend. Probiotics and so on can't hurt, but definitely don't take anything like immodium as any germs need to be got out rather than left in there.