I Started taking BCP after my 3rd child was born in April, I am o...

I Started taking BCP after my 3rd child was born in April, I am on my 5th pack of Loestrin 24fe. The first 2 packs I really thought I was pregnant again! Morning sickness, and my periods were literaly 1 spot of brown and that was it!! Now that I am on my 5th pack I have technically had only 1 period on these pills and that was around the 1st of Sept. I am one week into this new pack and never even spotted during my "brown dummy pills"! Anyone else not having periods on this pill? I am concerned that this is not healty, God gave us a period for a reason right???? Is it not necessary or do you think this is okay? Very concerned bcause I do not want to get pregnant right now but do not want to be unhealthy either...PS I have not taken any birth control since 1998 so I don't even really know what's available now days!!