Braxton Hicks or actual contractions?

So I got a check on Friday and was 0% effaced and 0% dilated and baby wasn’t low but I’ve been having Braxton Hicks for weeks now. Last night I had like 3-4 back to back and 1 was so bad I had to focus on what I was doing because it hurt so bad. Today I’ve had 2 painful ones so I didn’t think anything of it but In the last hour I’ve had 3 and there getting more painful. I’m 36 weeks pregnant, could this be labor? This is tmi but I’ve also felt like I really had to poop and have had horrible left side pain for the past 2 days