I have missed a month and 1 week of my period, I have had unprotected sex, I did get off birth control a month ago. I took a test but it came out negative. I have been signs of being pregnant but I'm not sure.

Missing or unusual periods are very common after stopping birth control.

Some women get back to "normal" very quickly while some can take up to 1 year.

This fluctuation of hormones can also make you experience "pregnancy" symptoms that are also similar to PMS.