period talk

So I've always had this but it's very annoying and I want to know if anyone else experiences this. When I start my period, the first and second day I get that uncomfortable almost painful gas and I have to use the bathroom a lot and it's not like my normal bowel movements lol. And it's just annoying and gross. Idk if it's hormones just changes all that or what. But I've always had it so I don't think it's anything to worry about. Anyone else???