35 weeks and one painful boob!

I'm 35 weeks pregnant and I woke up this morning with one breast hurting pretty badly. I can describe the pain as being exactly what it felt like to be engorged when I was nursing my first son. The breast is kinda hard, lumpy and painful even to the touch exactly like when I used to get engorged. The thing is that I'm only 35 weeks so milk shouldn't be there yet. Not sure if the fact that this is my third pregnancy has anything to do with it(lost the middle baby almost half way thru the pregnancy last year so my boobs had a good amount of time to grow even with that pregnancy and they sure did). Just wanted to know if anyone has experienced the same thing and what u did to help. I will be calling my OB in the morning, just wanted some input in the mean time. Thanks ladies.