are you having weekly appointments? i would bring it up to your doctor and maybe see if they can check and see if you are dilated any. but i wouldnt worry about going to hospital until contractions are a couple minutes apart and feel unbearable. i've been waking up in the middle of the night feeling them. i'm 38 weeks on wednesday the 30th.
If you think you're in labor, I'd call your ob and ask if they think you should go in. Some offices have an after hours nurse you can call too.
My doctor told me 5/6-1-1 so 5-6 minutes apart lasting one minute, for one hour, I labored at home with strong contractions but they were 10 apart for 24 hours, they lightened in pain but got more consistent Saturday morning and I ended up admitted
My provider told me 4-1-1 (4 minutes apart, lasting a minute, for one hour)