Severe Dental Infection - Recovery?

So last week I had a pretty severe infection after receiving my first root c treatment. I woke up with pain and swelling the size of a softball (no joke). I had to go to the ER where I was given an IV of clindamycin. I was also put on a perscription of Clindamycin 300. The swelling went down, no more pain. The dentist saw me last monday, but did not want to continuet the root c until the infection cleared. Fast forward to today, while the swelling is 90% gone, I still have a hard bean-sized swelling under the tooth along the jaw. It almost feels like bone.. I am out of clindamycin and I hope the infection does not return. I'm also suffering from allergy type symptoms right now (runny nose, cough, may be unrelated). My question is, should I be worried about the hard bump on my jaw? Could it be that the infection damaged my bone? Is the runny nose excess phlegm any cause for concern? I go back in on Monday...