What kind of pre-test should i do to make sure that i don't have any fertility problem for me and husband.what about lupus test&can it affect pregnant?

Try first, maybe...: Healthy couples typically won't need fertility tests before trying to conceive (80-90% will do so after one year of regular intercourse, 2x/week). After a year of "trying" with no success, then see a fertility specialist. If you have medical problems requiring chronic drugs or that potentially decrease fertility, or you are likely to have a "high risk" pregnancy, get an OB doctor now & get advice.

Fertility tests: Specific fertility testing is not recommended unless there is clearly a problem (eg., you've been trying at the right time of the cycle for over a year). The most important data to collect for you is your basal body temperature chart to be sure that you are ovulating each month. . Lupus anticoagulant factor can cause repeated miscarriages, but this is usually only tested if you've had one.