Description of Braxton hicks

Zorayah β€’ I'm a FTM engaged due Jan 8th,2016 with a little girl πŸ’œβ€οΈπŸ’—πŸ‘ΆπŸΌ
So I went to the ER the other night due to my dog jumping on me. My daughter was fine but my mother and mother in law believe I may have been having Braxton hicks can someone please describe how they felt to all of you if you had them and when they started I'm 21 weeks and 1 day. Thanks so much ladies