Braxton hicks or actual contractions?

Br

I keep having contractions everytime I am up on my feet and the longer I am on my feet, the closer and stronger they become 😭 they were 10-15 minutes apart last night for 3 hours straight before I was able to slow them down with a bath, chugging gatorade and laying down on my side . I have an appointment tomorrow with OB . anyone else have this ? I'm 29 weeks and just nervous. I never had this with my daughter so it's all new to me