Question: I need help....

Ok! My period came down March 27, so me and my boyfriend was trying to have a baby. I had all the symptoms like I was pregnant. I was supposed to get my period April 27 but I was 5 days late, then AF came down May 2 and it was so light. It only lasted for 4 days. I need to know what’s going on With my body and why I skip a whole month!!!