 [ Symptoms ] is a medical spa the right place for invasive surgery [ Disease ] i highly doubt that you are pregnant stress and worry can cause irregular periods also pre cum does not 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 would not have had a second period regarding the peeing four times frequent urination does not 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