Habit of repeating things

[iCloud]

Hi!

I have a habit of repeating things, like while walking when I come across a square tile or stair-case, I stop there and step over it twice and then move on. Similarly, I sometimes repeat words or sentences. Also sometimes I try to make people say something twice like reply to my question "Are you sure?" etc. I know, this might annoy people and I am really concerned but I cannot help myself.
Another thing is sometimes, when being alone in a room or somewhere, I tend to cry without any reason at all. I sometimes tend to ask myself, 'What's the reason, why am I crying?', and I have no answer for that.

Do I have some serious psychological problem or something? How can I help myself? I am 19, male.