Today my 4 month old DD started fighting me at feedings. The first 2 of the day were normal... since then it's been very stressful. I'm pretty sure she's hungry, but as soon as I put her to my breast, she starts crying, screaming and fighting me. I've tried changing positions, gave her a bath. She did eat again, but I basically held her there for a minute until she took my nipple into her mouth (I'm not trying to force feed her, but she has only eaten a total of five times today, which is very unlike her normal 8 or so). After that, she nursed as usual, about 10 minutes. Is this normal? Is she not needing as much? She doesn't take bottles very often, so I know it's not nipple confusion. She's otherwise very happy and acting like herself.
I'm just worried that she isn't getting enough hydration. Her diaper output has been good so far today, but tonight when she goes to bed she will probably sleep through the night and not eat until the morning. Am I being a freaky worry-wart? Is this just a phase that's starting? Is it OK that she goes a day or two without eating as much as she normally does?