Feedback please!

My period was about 5 days late. I got it but I got some really painful cramps right before it started (which isn't entirely unusual for me, they were just a bit more painful than normal).
I've also noticed that my flow is heavier than normal and I've been experiencing nausea, which Glow told me wasn't normal to have during your period? 
Can anyone tell me what this could possibly mean? I don't have health insurance but will go to the doctor if necessary