DD is 4 months old, 18 weeks, and the past few days has been nursing less. What used to take her 40 minutes +, now only takes her 15-30 minutes. Let me try to describe what happens.

I feed her in the nursery to try to minimize distractions. I start her on my left because it's my "bad" side and usually she'll go on fine and nurse for about 7-8 minutes. She'll pop off and whine and I'll try to put her on again. If she comes off 3 times, I'll switch sides and she'll nurse like 10-20 minutes, but she'll pop off, whine/cry, come back on, pop off, whine/cry, etc. I usually sit her up at that point and see if she needs to burp. Sometimes she's still fussy when I sit her up, sometimes she's perfectly fine and smiley! I end up trying to get her to latch for a while longer and eventually she'll refuse and arch her back and look away and refuse to turn her head. Sometimes she'll cry and I'll sit her up and she'll stop immediately.

Is she full and not wanting anymore, or is she distracted by everything? I'm worried about her weight gain, so this is making me very nervous!