Clomid and late AF

Has anyone taken 100mg of clomid and had a late AF?

This month was my second round of clomid and also the first time I had 100mg. One of my period tracker apps says that I am 4 days late and Glow says I am late by 1 day. I trust glow because I log my opks on this app and it knows exactly when I ovulated and the other app is off by a few days. This cycle I had slight cramping on CD 10. Then nothing else. I haven't had any AF symptoms at all. No cramping, no sore boobs, no increased appetite or cravings.. I actually don't feel anything at all. Has anyone experienced this or did the 100mg clomid ever make you late?