The last time I had intercourse was August 8th and 11th. I then got my period on August 26. My cycles are consistent around 34 days. But my period still has not come . I am now 14 days late and I just started having brown discharge or something. I have not been stressed and I am not on birth control. I also don't have any other symptoms besides really bad lower back pain and being tired. I know about some people still having bleeding like periods during early pregnancies. I just wanted to know what you all thought

If you only had sex in August 8/10, you are not pregnant, particularly with an intervening period.

Bleeding can and does happen throughout pregnancy. A period does not. So, are you sure that the bleeding you had, on August 26, was a period?

If you're 14 days late for your period try a pregnancy test using first morning urine. If that test is negative, wait and see what happens with your next period.