I've taken over the counter pregnancy test and one in my drs office. All negative but I still miss my period every month. How can I get pregnant?

Depends. You may wish to delay having children as you are quite young. However, if you have sufficient resources to take care of a child or children you need to address the following. If you have been having unprotected sex for a year or more, you need to consult a fertility specialist. If it has been less than a year, you may wish to time your sex better by learning to find out when you may be ovulating.