labor

3cm dilated 70%effaced
Been having contractions consistently 
Went to ob on tues told me I was going to go early 
They hurt but are not unbearable 
All of a sudden I have been vomiting.. last 4hrs I have such bad heartburn 😥
My question is it time to go to l&d
I have been there a few times already and I really don't want to go if it's not needed 
My ob told me to go when the contractions are unbearable 
Please help