What can this be, time of year or something else?

On sunday morning after me and my boyfriend had sex, I go to work then I go to the restroom to find that I had some brown discharge on my panties. I have my nuva ring in at the time and then concluding night at around 9 I notice there be some more brown discharge, then my stomach started cramping up, so I assumed I have started my period, consequently when I got backbone from work I took the tampon out and there wasn't much blood. This afternoon when I took the tampon out, still assuming that I'm on my time, the blood was darkened, but it wasn't as much as it should be. So what do you think this can be?
Answers:

This is so embarising!! girls simply!?

Congradulations, you are the proud owner of a bouncing trip to the doctor.

Oh nooo! Please help meee!!?

sounds approaching your period. Don't verbs. sometimes it's funny like that.

Is it adjectives for women to urinate while having a orgasm?

It sounds close to your period, but it could be somthing more serious. i sugest you dance to the doctor and get it checked out.

After a hysterectomy, will I still to through menopause?

Just to be risk-free, you might ought to visit the dr for a preg assessment. Sounds like pregnancy spotting.