When to seek medical advice

I have PCOS and have had nightmare periods before but this one is the most excruciating I've ever had, the back pain and cramps won't go away with midol or a heating pad. "Pushing" is the only thing that helps. I am also having to use ultra tampons instead of my usual super tampons and I am going through them every 2-3 hours. This is the first day. I did have unprotected sex during my ovulation period.

I'm currently not home and in a foreign country, at what point should I consider medical attention?