Period nausea, please help!

So last night I was feeling super nauseous, like on the absolute verge of puking (I never actually did, though). And then this morning I started my period. Pretty heavily, I might add. Like I literally stood up and bled on the floor. TMI, I know. But I was just wondering if it's normal for my period to make me feel so sick? I've only had something similar to this once and that was August of last year. I mean, I always feel somewhat nauseous before/during my period but never usually to this extent. So I'm just curious what you guys think. Do I maybe have some stomach bug or is it more likely that it's just my period being extra troublesome since this happened hours before my period started? Also, my period was 3 days late if that makes any difference.