Is labor coming soon?

Je

So I started having really bad nauseous and indigestion early Monday morning. Last night (early Wednesday morning) I’ve been having period like cramping and back pain. I went to take an afternoon nap and just now found a nickel size blood spot on my sheets. My mom says it’s most likely was my mucus plug and my twins will be here any day up to 2-3weeks. My underwear have been damp all day, and I’ve changed them a few times. I am 33.1weeks with di di girl twins. I was wondering if this has happened to anyone else and when did you all go into labor?