Is it normal while on the birth control pill for bleeding to become light and barely there on period days?

Last month I got my period on a Monday and it was super light brown/pinkish blood and it persisted for about 4-5 days but it was super light and barely there (it didn't even fill the tampon). [at first i read this could be implantation bleeding but it was during my period week and i took an HPT a week later and it came back negative).

Now I just got my period again this Monday and it wasn't visible until I wiped and now Monday's tampon barely had anything on it.

I'm freaked out. Is this normal? I've been on the pill since December 2010 and I'm really confused.

[looloo141]

Hello it sounds to me that the pill is working great for you, it does make periods a lot lighter and a lot less painful..so it sounds like a normal reaction to me, it will have taken a few months to get into your system thats why its started happening now, its a good thing, no more heavy painful periods, my love.
Don't worry.

[amani4]

I am on the pill and have not had my period for 4months .