Ok my period was dec5 but it only lasted 3 days. And now I have pregnancy symptoms. What's going on what's wrong with me? My periods are also irregula

Well. Start with a pregnancy test and get that concern off your plate. Consider the pill if your not interested in pregnancy. Take them at night if u get side effects but this will regulate your cycle over time. Pregnancy symptoms are vague but consider some zantac (ranitidine) for heartburn and the anxiety of thinking your pregnant adds to your stress which can snowball into increased perception.