FTM breastfeeding question

I just had my baby on the 2nd. And I've had some problems with him latching. I've breastfed him for 1hr when he first came out, then only 35min. Max every feeding after that... I just got home today, and he's been eating for 1 1/2 hr, straight. And still going. Is he not getting enough to eat? Am I not producing enough anything? I'm not sure. Should I call the dr.?