Missed period but not pregnant

My period was due 2 days ago and has not shown yet. I went to the ER the night before last because my back was hurting (I think it was a pulled muscle) Anyways, they gave me a pregnancy test that was negative so I know Im not pregnant. The test was a urine test and if I was pregnant I would be 9 week seeing as that I haven't had sex since Thanksgiving and I had a regular period afterwards on November 30th. I DO have PCOS but my cycles have been regular since June or July of last year. I've had a cycle every month and my cycles are 33 days long. The pregnancy test that was done was a urine test that just gives a negative or positive result. Any advice ladies?? I have had some symptoms like sore breasts, peeing a lot more, being tired, cramps, and bloating

[Faye7490]

I have PCOs and my periods are not regular at all.

A urine test is not always reliable.
Have you gone to your doctor to ask for a blood test?

Regarding the symptons that you seem to be having can be caused by stress or even over working yourself.

I would suggest that you speak to your local GP as he/she will be able to steer you in the right direction.

I hope everything goes well for you. Good luck

[SexyDiva19]

Thanks. Every since June or July of last year my periods have came EVERY month and using a website to track my cycles I know that my cycles are 33 days long. It has came on the day stated on this site every month except this month. I'm no more stressed out then usual. I have a 5yr old son and I will be starting college tomorrow. Maybe it is just stress or the PCOS?? Thanks for the well wishes :)

[ProudMumToBe]

I would suggest having a blood test done as it is more accurate
I am 25+ plus weeks pregnant and My urine test did not show until I was about 19 weeks as I did one wanting it for the memory.
I know of people who do not show in a urine test until much later