Problem with time.

i wonder why i get so stressed. when someone says: "we'll meet at 9am," I fear I'll be just a little bit late, like 4 minutes. or if someone says: "we'll be back at 8.30pm," and we actually come back at 8.45pm, I get really stressed for no reason. I also always plan how long it takes to do different things. i.e. if I have to meet at 8am, it fits that I get up at 6am because it takes about 20 minutes to take a shower, but just to be safe, I add 15 minutes on top. so it's 6.35am. then I eat breakfast and it takes about 10 minutes, but I add 5 extra minutes.

it's what I spend most of my day on. it's also time that I worry about the most, and i don't even know what I'm afraid of. I know I won't be late, but I'm just always worried about the time. Also when I ask what the time is, I need an exact answer.

Am I the only one that is experiencing that? I hate it, and I really don't know what's wrong with me, because this cannot be normal. Someone please help me.