I would think it's a combination of two things: 1) she's not getting enough nighttime sleep and she's getting over-tired, which means she needs to start going to bed earlier (it's about this time that they transition from 9-10pm bedtime to a 6-7ish bedtime), and yes, that means she will start getting up earlier (at this age, the "typical" night is from 6:30 or 7pm to 6:30 or 7am... which means your baby could bookend this by as much as an hour in either direction; it is unlikely that she will be sleeping until 8am any more, but should be getting closer to the 12 hours she needs, instead of the 10 she's getting now).
2) she's going through what I like to call "Distracto-Baby phase." The "Distracto-Baby" is easily distracted, and wants to do just about anything other than nurse, unless you try to put your breast away and stop the nursing session... then, oh no, it's definitely time to nurse... until you give her the breast, and she'll nurse hard for like 10 seconds and then.... what's that? a ball? let's look at it! oh, cool, there's my book, I was looking for that! hey, check that out! I can wiggle my fingers! have you seen my toes?! ... Wait, what, you're putting the boob away?! oh nonono, it's nursing time, mom! get that thing back out NOW!
seriously, she's starting to be much more aware of her surroundings, and her place in the world, and her ability to change/do/move things, and all of these are enormously exciting. you can help her focus on nursing by doing it in a dark, quiet room with as few distractions as you can possibly have. or, you can spend all day with your boob hanging out. but few of us can handle that one.... :) so I'd just make sure that you try to do it with as few distractions as possible, and when she's distracted, just try to put your boob away without her noticing, so that you're not starting to feel like your boob is a yo-yo.
at the same time, I would slowly move her bedtime routine back by about 15-20 min every couple of nights until you're putting her down closer to 6:30 or so (once you get to 7:15pm allow a week between changing the time, and that way you can start assessing the point of diminishing returns... when going to sleep earlier means getting up earlier, too, and so it's not worth going to sleep any earlier. you just want to find that window when she's getting the greatest number of hours of sleep, but when that window is depends from kid to kid). expect that she will wake up once or twice during the night to nurse, it will suck, but it will be temporary. just get up, nurse her, and put her right back to bed. in a couple of months that should subside, and if it doesn't, you can decide how to address it at that time (it will depend on how well she's napping, how much she's eating, how well she's growing, what your schedule is and your tolerance for sleep-deprivation....). then, during the day, really focus on getting her her 3 naps, so that she's not getting over-tired. it will take several weeks of focused work, but you'll get her back on track. she's just going through a developmental change right now, and you have to adjust her schedules accordingly. there will be many of these... :)
good luck!