9 weeks since. Just precum, no penetration. 3 neg tests 4, 6, 8 weeks after. 2 weird periods. Sore nipples this week. Pregnant?

Not from 4 weeks ago. Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon.