I too have a family history of hypoglycemia...you're not alone!
I'm a junior in my program, and we have 12 hour clinicals. I was initially really nervous (I usually eat at least every two hours!), but found that if I'm careful, it's pretty easy to regulate my blood sugar. First, stay REALLY hydrated. Seriously, every time you're not in a patient's room, you should be drinking as much water as you can! Second...try swapping out the simple sugars with complex carbs, protein, and fat. Before I go to clinical, I have a big bowel of grape nuts and whole milk and coffee with whole milk...for some reason, the combination of fat and protein and sugar in whole milk (as opposed to skim or fat free, which make me crash later) really regulates me. For my lunch break, I try to bring either quinoa or brown rice with black beans and cheese. Delicious, and my blood sugar doesn't plummet a half an hour later. I also try to keep a stash of emergency almonds in the break room (you might want to keep them in your scrubs
just in case) to snack on if I'm feeling low.
I agree that you should be working with your doctor to make sure there's not something else going on...but you could be like me, just running low with no real explanation. If that's it, you just need to learn to self regulate. Everyone's body reacts differently to foods, so you need to find what works for you! And if you start feeling dizzy- just sit
there's no shame in passing out, as long as you don't endanger a patient.