There's a chance of me being pregnant. I had unprotected sex on sept. 1 and I lost my virginity too. I had really bad cramps and stuff, then I got my period. I just went to the bathroom and there was something unusual. It was somewhat solid , not like regular clumps that could come from your period but thicker and more brown. I don't know what that is or what it could mean.

Since you apparently didn't know... virgins can easily get pregnant... so the part about you losing it has absolutely no value in this discussion.

You can get pregnant even while using several forms of birth control... correctly. No form or forms of birth control are 100% effective... even cumulatively... they are always something less. Unprotected sex is 0% effective... relying purely on luck. Sort of like playing Russian Roulette.

Having unprotected sex means you WANT to get pregnant. There is no other valid excuse.

Now having your period some time after means you got lucky, or unlucky depending on what you were trying for. Even if it was irregular.

If you are having your period, you are not pregnant, clumps may be something else, but is not pregnancy.

As noted for future, no birth control is 100 percent,