Tomorrow i will be 36 weeks pregnant. lost my mucus plug yesterday and today im still losing it having contracts every 5 minutes. can i be in labor?

Sure: If you are contracting five minutes apart for more than an hour then you ought to head to the hospital to be evaluated for preterm labor.

Could be: While losing the mucus plug isn't always a predictor of labor onset, the contractions may be real or false labor. Call your OB provider today and discuss it. Most OB docs/midwives have an answering service. Call the office even if closed for instructions.