My bf & I had unprotected sex. 11 days after my last period and following this I experrienced dark brown spotting 10 days later. I've since had no period and 2 negative hpts but the last of these were taken 2 weeks ago. I don't want to keep spending unneccessary money and its impossible to get an appt to see my GP due to the fact that I work during opening hours. I'm 25 y/o and my last period was now 41 days ago. My cycles are usually approx 28 days. I've had no nausea but my breasts are heavy, extremely tender and I've had strong cramps and lower back pain for weeks now. What should I do??