So I'm noticing that my daughter is starting to nurse for only like 5-15 mins! she still has a few…

So I'm noticing that my daughter is starting to nurse for only like 5-15 mins! she still has a few longer nursing sessions like 30 mins, but the ones in between seem to be shorter. At first i thought she was just getting distracted, but even in a quiet room I'll try to latch her back,but she bends all backwards and starts to whine and tries to roll away! lol so I figure ok I guess your done. Anyone's else's LO do this? she just turned 8 months but started this about 2 weeks ago.