What’s happening to me?

I usually post my stuff here because this is the only place I usually get answers.

Last week I wasn’t feeling any period pain. I usually get cramps a week before I get my period. This month is totally different and confusing. My boobs got bigger but not hurting this doesn’t happen when I’m about to my period. I thought I was pregnant for second. So Wednesday morning I saw little blood, but I couldn’t really sleep. So I decided to take pregnancy test than came negative 😭😩 now I’m on period but the question is why I’m not feeling any cramps or anything. This is the first time in my whole life, going on my period but not feeling any pain.