Is It Normal to Have Brown Discharge while on Birth Control Pills?

So I was feeling myself a bit and soon enough my fingers are covered in dark brown creamy stuff. I started taking the pill around 3 weeks ago and want to know if anyone else has had this problem?? I never used to get cramps but now they are regular and excruciating, they have also been especially bad today 😖 I also had a lot of sex at the beginning of my period (the week before I started taking the pill) where I let my boyfriend cum in me and now google told me it could be implantation!! Please tell me this has happened to you while starting on a hormonal contraceptive 😳 sorry for the gross picture 🤢