Have red spots on my skin that go away after a day or two but come up on different parts of the body especially after playing sports. bruising also?

Be seen: I would be seen and evaluated for a possible coagulopathy. Bruising is essentially bleeding in the soft tissues; and what you are describing with the red spots could also be associated with spontaneous bleeding. It might be a good idea to be seen just to make sure you don't have a blood disorder; not to say you have one, but it would be wise to be seen.