Braxton Hicks vs “real” contractions


I just had my 24 week appointment and am 24+4. We were talking about preterm labor warning signs but I’m still not really certain. I do have a 2.5 year old but I was induced with him on pitocin. So I honestly have no clue what “natural” real contractions feel like. I definitely know Braxton Hicks because I had them with my son and so far since 16 weeks with this baby. But I guess I just can’t even imagine what it’s “supposed” to feel like when your body isn’t being forced. My midwife tried to explain best she could but I just still don’t know. Can anyone help explain?