Immune Systems beware

I have had difficult, heavy periods since I first had mine at 13, so I thought that birth control might help me to finally regulate some, which it did.
Just wanted to let you gals know that, for me personally, my already sensitive immune system was severely compromised by taking birth control - I was catching sicknesses left and right, despite healthy eating, vitamins, essential oils, etc. until I did some research and found out that birth control might not be helping. I got off this past summer and have been really recovering since then - catching ill a lot less frequently. I know my experience is not the same for everyone, but just thought if anyone else was struggling they might want to know that possible side effect.
Since getting off, my periods have still been much better than they used to be.