Pregnancy symptoms vary greatly from woman to woman. While some start noticing the first pregnancy symptoms right after the procedure, others do not have any symptom for the moment.
In any case, having symptoms of pregnancy earlier than 15 days after IUI is uncommon, except for implantation bleeding.
Check out this for information: What Are the Most Common Symptoms of Pregnancy?
Suggested for you: What to Expect After Intrauterine Insemination (IUI).