Early labor?

Hi everyone. I am 34 weeks pregnant with my 3rd child. My 2nd was a premie born at 33 weeks, I've been on the makena injection to prevent early labor. Last night I had spotting and what felt like small contractions, they weren't painful so I didn't go to the hospital. Today I don't have the spotting or the contractions but I have pressure in my vagina, it hurts to even walk. Could these be signs of preterm labor?