Contractions??

I have been getting braxton hicks contractions since my second trimester and now that I’m 37 weeks pregnant I’m getting them most of the day every day. They are very uncomfortable and some can be pretty painful. I’m worried I’m not going to be able to tell when it starts to be early labour! Any tips? I know some people will say “oh god you’ll know” but will I really? These practice contractions seem to be as regular as normal contractions build to be more painful especially in the evenings.