How soon after sex can you take a pregnancy test if have no period because are breastfeeding?

If you are breastfeeding and experience irregular periods, It can be more challenging to pinpoint your ovulation with certainty. Generally, it's not recommended to take a pregnancy test immediately after having sex because it may be too early to detect the presence of pregnancy hormones in your urine. To improve the accuracy of results, consider waiting approximately one to two weeks past the expected date of your missed period before taking a pregnancy test. If the outcome of the test is negative but you're still have doubts or experience any pregnancy symptoms, consult with a healthcare professional for further advice and potential alternative testing options.