You probably won't get in trouble until someone starts complaining that they never get to take their breaks. Or until they notice that you're never on break. Even then, most likely they'll just tell you to take your breaks. The big one is meal compliance, so take your lunches on time and you should be golden.
For what it's worth, I encourage you to take your paid breaks. Target is paying you for fifteen minutes to do nothing. So if you work through a break, then you are essentially giving that fifteen minutes worth of pay back to target, since you'd be paid either way. Basically for that fifteen minutes, you're working for free. Now, have I missed breaks in my time with Target? Yes. I used to skip breaks almost daily because I'd get wrapped up in what I was working on, but I don't do that anymore. If target wants me to take a break, I'll take a break. The work will still be there when I get back. Or if I haven't taken a break all day, I might take a few minutes after my lunch or take a last break in clerical before I leave. If I'm working 8 hours, by policy I'm owed an hour's worth of breaks, 30 mins on the clock and 30 mins off the clock. Why should I work when target wants to pay me not to work?