When to call L&D?

Ellie • Engaged to my soulmate💏and newly a SAHM to a 8 year old boy 👶🏽 4 year old girl and my newest baby girl born 1/25/18👶🏽👶🏽🎀🎀 💕

I have a c section scheduled for next week BUT today I have been having contractions pretty regularly since 3pm. It’s now 8:30p. They’re about 4-5 minutes apart.. it starts in my back then goes to my stomach and pelvic bone area.

I’ve been drinking, laying on my left side, and taken Tylenol 3 times today. The most recent time was an hour ago..

thoughts??