Hallow Dear, You may swear and say that he did not ejaculate in your vagina; however, not precumming cannot be said so confidently since this secretion is very little and is deposited (or released) unknowingly. Precum does contain sperms which can cause pregnancy. Though stomach aches and cramps are not symptoms of pregnancy, you have to consider the possibility of pregnancy since you had unprotected intercourse. Nothing on the earth can detect the pregnancy just 2 days after the intercourse. Beta hCG test on the blood can detect the pregnancy 10 days after the last unprotected intercourse. Alternatively, you may wait for your menses to appear. If you get menses, you are not pregnant. If you miss your period, wait for about a week for pregnancy test since earlier these tests may report false negative results. One week after the missed period, you may perform pregnancy test on overnight early morning first urine sample. The first cardinal symptom of pregnancy is missing a period. All other symptoms like nausea & vomiting, frequent urination and breast symptoms appear about a week to 10 days after the missed period. And they are not diagnostic of pregnancy. The confirmation has to be done by either of the tests mentioned above. I hope this helps you to relieve your stress. Dr. Nishikant Shrotri