Dec 25 i had an iui.i got a short period in jan. i am now late,i'm never late. negative tests, but tingling in breasts and sharp jabs in lower abdomen?

Tests are accurate: Today's home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine test will give a reliable result 3 weeks after sex or IUI (or when conception might have been) 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.