Breastfeeding Confession

I have a confession today. For some reason I don't think Caleb has been getting enough milk today. I am probably dehydrated due to the terrible heat and just not keeping up with my water. That is probably why Caleb has been fussy today and not sleepting too well. Well, I broke down and gave him some formula from a bottle a little while ago. While I was giving him the bottle I had thoughts of how much easier it would be for Caleb to be bottlefed. I was having thoughts of quitting breastfeeding. I feel terrible for thinking this way. What is a mother to do?