Discharge or Period?

Emma

Hello, I had the IUD in for about 1.5 years and I just had it taken out due to bad side effects that stayed the whole time. Well I got it out and went back onto the pill and now I’m having a dark brown/red liquid discharge (i’m not supposed to start my period until two weeks) and I’m hoping someone will comment and say it’s normal, is it just my body getting used to changes or would I need to go see my doctor?