New To Birth Control..Pregnancy Symptoms?

Today is officially one week on birth control. My breasts are sore, I feel bloated and it doesn’t feel amazing to lay or press on my belly, I have cramps in my lower abdomen, I keep feeling like I have to poo. I’m tired and emotional and my discharge is white and a bit heavier. I’m also a few days late on my period. What the heck and how long is this going to last?