I might be in labor...!!!

So yesterday I did my 4th round of acupuncture and had some intense contractions, got home and had some brownish discharge through out the day but no contractions. I took a tablespoon of castor oil around 9pm and by midnight I was feeling pretty crampy and was in a bad mood. We went to bed. Got woken up at 3:30 with contractions so I'm walking around and moving on my birth ball hoping this is the real deal. I'm 41 weeks 2 days and if this isn't labor I'm getting induced tonight at 8pm. I hope this is the real deal!!