Nursing Trouble...helppppp!

Shelby • 👱🏻‍♀️♥️🧔🏻👦🏼👶🏼🐶
My son is 5 weeks old. The last two nights while nursing he will latch on, suck for about a minute, sometimes a couple, then spit it out and squirm. Then he gets upset bc he still wants it? Is this gas? I'm not sure what to do or how to help him! Not to mention our nursing sessions have gone from 20-25 minutes to 30-40 minutes.