what the heckkk

I am due for my period the 10th, but I got it today (the 4th instead). I was having strong cramps throughought the day thinking I was having stomach issues when I realized I had just gotten my period. The blood was dark and even had a significant amount of brown in it. Once the brown passed it went back to a normal red period shade. I'm not sure if the brown will come back. It's not a heavy flow and I'm not seeing blood clots either. I have recently gone through a diet change and have commited to working out daily. My mom tells me irregular periods are normal as I have been irregular before but this case felt stranger especially because of the brown discharge. I want to avoid reading on the internet as much as possible to not scare myself but would also like some honest opinions and experiences through here. Trying not to be totally scared, Thanks ladies!