very short period?

So i came on the 4th may. My periods are usually quite heavy last about 6 days. I usually get period pains.

However this month my period pains were only when i walked i was fine when sitting down which usually dont matter. I came on the 4th had some blood but nothinf compared to my usual period. usually the 2nd day it gets havier, but the 2nd day this time.it didnt. I could have left my pad until night time without changing it. Then it just went to light brown. Was hardly nothing, then yesterday which was my 3rd day i had litrally nothing! apart from when i wipe i got a very tiny bit of brown and same today completely nothing so ibe took my pad off.

I just think this is unusual its never happened before and im usually a LOT more heavier and last a lot longer that what ibe had.

What do you guys think? please help!