Hmmmm....the symptoma alikatz mentioned are actually the first signs of diabetes-excessive thirst and urination, and weakness/dizziness when blood sugar gets low. You would feel constant, unquenchable thirst. Possibly an unexplainable drop in weight, followed by an unexplainable gain.
First off-I'm not a doctor, but I wanted to comment. Feel free to totally disregard the following

The dark circles under your eyes can be alot of things, but the most common problem has to do with allergies....the time of year, the fact that you're getting out more, etc would lead me to suspect that may be the case. My daughter gets them. The dr called them allergy eyes, but I'm sure there's a much more medical and scary sounding term for it-and he said it's actually very common.
The itchy groin I would probably relate to the fact that you are going to the gym more than your body is used to-a heat rash type thing from sweating, body heat, and friction from your clothes when you exercise.
Neither one of these have I ever heard of as being indicators of diabetes. The internet is sometimes a blessing, sometimes a curse. We could all diagnose ourselves with diseases and syndromes in a fit of hypochondria a little too easily with the plethora of information available, mostly from people who have no idea what they are talking about

It's SO good that you are making a conscious effort to lose the weight, especially with a family history of diabetes. My father, my aunt, and my husband's mother ALL passed away from complications of diabetes. People with the hereditary tendency to blood sugar, insulin, and metabolic disorders should be especially aware of problems with weight.
Bravo on having it checked out....not everyone displays the textbook signs and symptoms for diabetes, and with a predisposal to it regular screenings aren't a bad idea anyway. Better safe and all that.
Best of luck with the medical tests, and with your
weight loss goal! Keep us up to date on how it's all going!
Laura