I think i might be prego but i still am getting my period

Hi,
Welcome to ehealthforum,
Few women can continue to have period like bleeding or decidual bleeding at the expected period time during first few months of pregnancy. The symptoms that you describe (feeling sick, vomiting, altered/lighter periods) could be suggestive of possibility of pregnancy. Look out for development of any other new symptoms. Wait and watch for your next periods. If they do not start within 10 days of expected period dates (sometimes they can be delayed by 5-10 days due to stress), or if you get abnormal periods, or if you develop any other new symptoms suggestive of pregnancy, you should consider visiting your doctor/gynecologist for further examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately).
If pregnancy gets ruled out, and if you intend to remain sexually active, consider visiting your doctor/gynecologist to get started on suitable regular birth control measures to be protected (after your periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact.
Take care.