Uterine irritability or labor

Having an irritable uterus has been terrible, for weeks I’ve been having contractions but I’ve only started really feeling them within the past week and every time they start I time them but the only last an hour or two then they stop. But they actually woke me up this morning and I can’t go back to sleep because they are really strong and lasting longer. Luckily I have an appointment this morning already so we will see what my doctor says but I’m hoping it’s not real yet, I’m only 35 weeks.