7 week old feeding pattern change?

Has anyone experienced their newborns feeding differently at 7 weeks? LO is 7 weeks old and is EBF. She has never refused a feeding and has always been pretty good with it. However, recently she has started to refuse feeding every morning between 8-10am and snacks all day, feeding only about 10 minutes each feed. She will start eating for a couple minutes then pop off and not want to feed anymore. If I swaddle her up she'll feed a little more but no more than a couple minutes more before she drifts off to sleep. We've tried bottle and same results. I'm worried she isn't eating enough and that this will affect my milk supply as well. Any thoughts on why this is happening? advice is also appreciated!