Does this mean anything?

So yesterday morning I had to go in to L&D for contractions. (34w) They did all these test and also found I was 1cm and 30% effaced. Send home that afternoon after i stopped contracting. Had to go back in a 11 at night because they came back, checked again and I was 2cm and 50% effaced. Send home 2hours later. Now this morning it looks like I lost my plug. Had a HUGE chunk. About 5-6inch and thick. Should I call them? I know that they irritated my cervix by checking, but that felt like the whole thing

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