Let's try another tack. Has there been any inspection or maintenance scheduled for your building that might have allowed someone access to your living quarters with our without the presence of the building manager? It just seems pretty brazen to target an apartment randomly if it is in a highly-visible, well-traveled area with on-site management if the perp has no clear idea that it's a hit with a decent pay-off.
Now, to get a bit scary, do you trust your building manager? She has keys to every apartment, she knows your schedule, and she has the potential to know the location and value of everything in your place, including time to find out where you stash things. I was between projects (technical-service work in pulp mills) in Orange TX and Moss Point MS over a weekend over a decade ago, and decided to spend my down-time in New Orleans. It was Friday afternoon, so I made calls to my office, cleared up my schedule and took care of some other details, then headed down to the French Quarter for music and food. I remembered a detail that I thought important, but hadn't conveyed to my division head, so I went back to my motel and made the call. While I was on the phone, a maid opened the door (without knocking!) and I rushed up to grab her wrist. She started hollering to high heavens about me wanting some towels (I had plenty and had not requested any) and so I pushed past her only to see a security guard ducking around the corner at the end of the balcony. An inside, set-up job that would have netted them over $2000 in high-end photographic equipment (all my own, since I was a specialist and the company did not supply such equipment), a nice laptop (OK, laptops then weren't that nice, but they were way $$$$), and whatever else they could take. I ran down to the lobby and shouted at the manager at the top of my voice that two of his employees had tried to burglarize my room (some people in line left quite abruptly) and told him that I was off to the French Quarter, and that if anyone entered my room over the weekend, his ass was going to be in a sling. No problems after that. For reference, it was the Sunrise Inn closest to the FQ, couple of blocks N and a bit W. If you stay there, talk to the manager and let him know who's going down if your belongings are stolen.
Again, I'm sorry you're going through this, and I hope that you can keep your balance and do well on your exams. I'm rooting for you (however much that helps), and I know your dad will go to the mat with the insurance company to make sure they don't cheat you. That's the insurance companies' biggest money-maker - every uncontested denial or underpayment is 100% pure profit, and it's their go-to game every time. Good luck.
I know that you have to take time to study, but every once in a while, settle back and see if there's anything missing that you haven't yet noticed. When you get time (and a new digital camera), get out all your stuff (even clothes) take pictures of all four walls of every room, burn 'em to a CD and send them home. If there is special stuff, annotate the pictures. I bought my wife a small tiger-maple Sheraton side-chair with expertly carved splats and a cane seat for Christmas several years ago. A good picture can mean the difference between nothing (or perhaps $20) and $500 in an insurance claim.