Hi and welcome to BW!
Although often frustrating, short naps are very common at this age. They can start to affect nights, so it's something to keep an eye on. Basically at 11 weeks, you'd expect to be looking at an A time of about 1h15/20/30min and around a 12hr day, so if she wakes about 6:30/45am you want to put her to bed around 6:30/45pm (give or take 15-30min).
Will she go back to sleep at all after that 5:30/6am feed? How are you putting her down to sleep for naps and bedtime, i.e. are you working on independent sleep? Are you able to post a few days of your EAS routine for us to take a look at?
Something like...
W/E 6am
A
S 7:20-8:20am
E 9am
A
Etc etc