Number Obsession OCD

For a while now I've had this odd number obsession. All number that I see have to end in 0, 3, 5 or 7 otherwise I get extremely anxious and it almost feels like my skin crawls. For example the volume of a device or the number on a sportsman's jersey.

Actually, I've had a few different 'obsessions' when I was growing up. For example, the was a time when I could only start with the right side of my body, like when I would tie my shoelaces, I would have to start with my right foot. Same goes for when I start to walk, I had to start with my right foot.

About a year after that I had an obsession with walking in time with the person I'm talking to, if they were stepping even a little bit off time I would quickly adjust my footsteps to match theirs.

Do you guys think it correlates to my brain development?? Also, have any of you guys had similar or the same experiences?