Yesterday was my day 7, I have an unprotected sex with my husband, I would like to know what is the chances of pregnency and what I have to do?

If trying to get... If trying to get pregnant (presuming 28 day cycles), be sure to have sex twice a day starting from day 11-12 for six days. Be happy, enjoy life, and don't think about pregnancy too much. It will happen when it happens, and if half a year goes by with nothing happening, then ask the doctor about it. Day 7 is a bit early to be getting pregnant.