Odd lump inside of cheek, near wisdom tooth

I am currently 15 weeks pregnant, as of today, and I cracked my wisdom tooth a few weeks ago by eating something. Now it's completely open...I started noticing a hard lump on the inside of my cheek near the cracked wisdom tooth and it's freaking me out. It's not too painful and it's been there for a few weeks now. I can't get to a dentist without getting a release form from my doctor to get an appt. I'm just really freaking out right now