You don't have to feel tired or sleepy to have sleep apnea. If you have it and it goes untreated, it can lead to or aggravate high blood pressure, weight gain, depression, anxiety, or heart disease. If one or both of your parents have any of these complications, then even more reason to get it checked out by a sleep doctor. Also, you don't have to be overweight to have significant sleep apnea. But the fact that you snore and are slightly overweight makes it likely that you have it. You could try to lose some weight and see how you feel, but if you're feeling drowsy at the wheel, definitely get it checked out.
I also have OCD (since 17) and get anxious and irritable easily.