Still trying..

my husband and I have been TTC now for 5 years and still going strong... I've been charting alot these past couple months and it says that AF is 4 days late ( I have irregular periods alot)... my hormones have been all over the place due to recent events and I've felt like I've had a stomach bug for almost two weeks now I just feel crumby with no energy. I took a test the other night after some BD and of course it was negative... I just don't get why I feel this way or what to do anymore I almost just wanna give up.