hi i am 33 on a 5days period....... 26 days circle for a long time presently i am on a 39 day for…

hi i am 33 on a 5days period....... 26 days circle for a long time presently i am on a 39 day for feb 2016 till march.....had sex 3 days after my period for 6 days i was expecting my circle to return to 26 or still roll on the last 39 days ....can i be pregnant bcs its 41 days now no sign of menses and no sign of being preg apart from occasional urge to vomit even at night which i do hv atimes even when i know i am not pregnant