i highly doubt that you are pregnant. stress and worry can cause irregular periods. also pre-cum doesn't always carry sperm especially if you partner has urinated since he ejaculated last. you might have had implantation bleeding if you had been pregnant but you certainly wouldn't have had a second period. regarding the peeing four times frequent urination doesn't usually start until the fetus is quite large like the third trimester or so. nausea could come from feeling nervous or a garden variety cold or flu bug.
i haven't missed any period. i had my period two times already is it possible to be pregnant? . on december 18th 2015 my partner and i were rubbing our genitals together but he didnt go inside nor did he cum. i had spotting on the 24th it was light red came with cramps and then on the 27th i got my period two days before i was suppose to get it. it was normal came with cramps but it was 6 days usually its 4 or 5. then i got my period on jan. 22. it was around 6 days too. and i got it 2 days earlier too. today i felt nauseous and peed like 4 times. and my stomach feels tight.