Is what I am experiencing diabetes?

hi! So I’m a 23 year old over weight female and I’m concerned I might have diabetes. I don’t know whether it’s type 1 or 2 but all I know it every 4 hours or less I start feeling weird and like I could pass out and have awful anxiety. I eat but barely because I’m terrified that I’m going to bottom out. I have a doctors appointment on the 30th of August but I don’t have any peace of mind until then. I also have terrible anxiety and have panic attacks daily. I don’t have any of the symptoms such as increased thirst/hunger/urination. Or fatigue or headaches. I do get shaky and weak knees but that could also be me getting used to my Zoloft. But like I said every 4 hours I start freaking out. Could it all be in my head or does it sound like it could be diabetes?