Weird feeling in penis

Lately for almost about a week now I've had this uncomforatable weird feeling in the head of my penis. It hasn't been the entire head just specifically the left side. I wouldn't say that it is painful but kind of uncomforatable and defiantly noticeable. I went for an std check a week before getting this feeling and everything came back negative. I did notice some frequent peeing but I drink a lot of coffee and water at work so I assumed that's the reason for the frequent peeing. I also don't have any lesions, blisters, swelling or anything in that area just the feeling. It's really getting me worried maybe the std tests were wrong or something. I'm a bit of a hypochondriac but this feeling is there and it's not just my anxiety speaking. Someone please help it's very very weird and giving me anxiety. Thank you