Last Night

I have had the backache from HELL the past couple of days. I even tried sleeping with a heating pad last night but it didn't help. I'm scared to take Tylenol so I'm trying to suffer through it as best as I can. I also feel crampy and a little bloated, even though that could be the Sonic corn dog and tater tots I ate last night :) My back hurts so bad I can't even get up to take Bailey for a walk. What in the world is going on? Twice yesterday and once already this morning I've even felt a little twinge of being nauseous. What can this mean?? I really wish Michelle would call me back!