I need some advice

I had my first child 2 almost 3 years ago, so I don't remember what contractions feel like. I remember just feeling crampy, like being on my period.. I was in labor when I went in for an induction and I wasn't aware. Like I said, just felt a little crampy. I didn't even feel pitocin induced contractions until I was almost 9 cm.

Anyways, the past 2.5 days I've been having my bloody show coming out in chunks.. Today I'm feeling crampy and my lower back is achey. I can't say that they are coming and going, because honestly, I don't know. I don't want to go to L&D; and be sent home because Its just last trimester cramps, but I'm also afraid of being in labor and not knowing. I do have a Drs appointment in the a.m. though.

If you were in my position what would you do? Would you just wait until morning, or would you go to L&D;? Is there other ways you could tell that you are truly in labor? I'm so sorry for sounding dumb...