How the real contractions feel?

Da

I'm 40 weeks today and I had my membrane stripped on my appointment this afternoon. I'm having lower back pain and also like period cramps but a little stronger. They are 3 minutes apart and last about one minute or 2 min each. I don't know what to do. Should I wait to go to the hospital? doctor told me that I was only 3cm dilated:/ any advice?