Signs of pregnancy?

Okay so im 12 days late on my period. Sore breats nipples,,diarreah(sorry if its too much info) more sleepy than usual,, back pains

Well lets see, you could start with a pregnancy test... seems like the most logical idea. These symptoms could mean pregnancy but could mean other things to, we cant sit here and determine whether you are pregnant or not.

Signs of oncoming pregnancy most of the time looks the same with signs of an oncoming period. You may be experiencing a delayed period due to your stressing if you're pregnant, or you can take a home pregnancy test now to make sure.

I misread your question I thought you said you were 12 instead of just 12 days late lol. im very sleep deprived right now lol.
Im sorry, I deleted my answer the moment I re-read your question.

So you know there are 5 signs to pregnancy
5 simple signs that are the first signs of pregnancy.
1. A missed period... if she misses a period you should always check just to be cautious.
2. Frequent urination, peeing a lot... and believe me she'll notice... because she won't be able to hold it
3. Sore Breasts, many women get this during that time of the month, but its a sign of pregnancy as well especially with the other signs.
4. Nausea, morning sickness, though not always in the morning is a very common sign of pregnancy , so you know not all women get this
5. Fatigue...

The main ones are frequent urination, everyone gets it... missed period and fatigue...
sore breasts are obviously common but come during your period and for other reasons... and most women get nausea, though I must say I did not...
Diarrhea, is not a common sign of being pregnant... but if you have these symptoms, buy a test from the store, its the same things doctors use just cheaper...
If not I'd go in and check for a possible infection.
good luck...