Thanks for your query.
If you had unprotected sex, specially during ovulatory days, then chances of pregnancy
are definitely there.
As a method of contraception
, withdrawal method is one of the least effective, as pre ejaculatory fluid also contains active sperms.
You need to wait till you miss your period, and then test using the pregnancy urine HCG kit to confirm your pregnancy.
could be due to early pregnancy, or other causes like mild gastroenteritis
etc. No way to know unless you perform the pregnancy test.
are not common in pregnancy, and you should check your blood pressure, as well as rule out habitual nosepicking. A proper ENT ( ear nose throat ) consultation is in order.