unsure about contractions

I hate that I don't know what contractions are supposed to feel like.  This is my second child but I never had contractions with my first til I was induced and it was all back contractions.  I have a lot of sharp right crampy like pains but I don't know if that's a contraction or nothing I should worry about. I'm also getting cramps in my back.  I lost my mucus plug two days ago... not that it means anything.  And I'm supposed to be induced on the 17th.   😩 I don't like not knowing !!! What if I'm having them and don't make t to the hospital! Ugh