I'm so tired and ready to give up on breastfeeding. Idk if she is really gassy and looking to my…

I'm so tired and ready to give up on breastfeeding. Idk if she is really gassy and looking to my breast for comfort, or just not getting full. She has been sucking on me off and on since 1230 and she eats for a least 15 minutes and I'm pretty sure she is getting full cause she normally does but maybe she's not. I'm just in need of a nap but she just wants to catnap today when I lay her down. Heeeelp. Breastfeeding is draining me....?!?