Hi, A Few Weeks Ago I Have Tried My First

Hi, a few weeks ago i have tried my first box of the 21 day pill of althea. Now i have consumed all of it. One tablet per day. But im not sure what to do next. Am i suppose to have my period right away? i have been two days off the pills since i finished the 1st pack 2 adys ago? should i take another pack of althea as soon as i finish the 21 day pack? can i still have sexual activities during this period?