I got a filling done yesterday. I'm really nauseous and I think I lost a chunk of it??? 10pts!?

I went into the dentist yesterday of a toothache. The dentist found a cavity and filled it. I ate a few hours later when the numbing wore off and I got pretty sick to my stomach and nauseous for a couple of hours. Well this morning I got up and ate breakfast (2 pop tarts) and I think when I put my tongue on my filling that a chunk is gone..is that normal?? And after eating I'm now really sick to my stomach. Luckily I made a dentist appt. today same place for a cleaning and exam. But until I get there my Question is ...is it normal to feel nauseous after getting a filling done?? And is it common for a small chunk of a filling to come out?? Thanks for the Answers!