My period is late by 3 days and my last period was just over 4 weeks ago and my period is very regular i get it every 4 weeks from my last and i had unprotected sex about 3 weeks ago and now i'm feeling sick, tired, bloated, peeing more and white/clear di

Irregular periods: Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections ; hormonal changes can cause spotting. If there is a concern for pregnancy then do a home pregnancy test . There are many options available to help regulate the menstrual cycle. Schedule a visit.