Why does this keep happening?

So I made a post last month when I was on my period stating that it was a bit lighter than what I am used to. People told me that it is normal for period cycles to change. Now, I’m on my period again this month and it has been the same. Still a bit lighter than usual. To be fair, this is my first day and the first day is usually like this but I’m worried it’s going to be light again. What’s going on with my body?? I’m getting cramps but it is still light.