Hello .I Am Elena N My Age S 32 .we

Hello .I am elena n my age s 32 .we have a baby boy age about 7 yrs . since last 2 years we r trying for second baby but did not get any positive result.In 2012 DEC I had a miscarriage of two month pregnancy. Sir plz tell can I conceive again or should I do any test or my age is the problem ..? I am also overweight .my weight is 79 and height is 160cm.I don't have any medical problem. plz do answer .thank you.