Combined pill and period like cramps

I started this pill 4 months ago, and i’ve noticed that i’ve bruised a lot, especially on my arms knees legs etc. i had swapped birth controls> from the injection seyena press to the combined pill and the injection, i had no period for the 2 year period i was using, started the pill and have had 2 quite big heavy periods- having a clear out isn’t an issue but the pain i am in is a lot. either way this pill is great whilst using for 4 months+ :)

my pharmacy moved me to this pill when my previous one was not available. I was hesitent at first but found it lightened my discharge which was always so heavy on my previous pill. I was forced to stop this pill due to unavailbilty but i am currently trying to get it back because after a month back on my old pill i am now seeing how much better this one was for me. I didnt notice the positive changes until i had to go back onto my old one. But if anything that is a good thing to me because it felt natural.

Within 48 hours of swallowing the first tablet I started to have Brown discharge which has grown into what would be described as a full on period with horrendous stomach ache, it will be 2 weeks on Sunday since I swallowed the first tablet. I'm assuming this is the breakthrough bleeding and my body needs to adjust but anyone else experienced this?