i don't know what to do

Anna • I'm 19 me and my fiance lost a baby in January. and now we are trying to conceive. and my fiance has a two year old son.

ok so me and my fiance got pregnant in December and lost the baby at the end of January. my periods have not been regular at all. march or February i didnt have a period. but this month i did. and I don't know if we should wait to try again or if we are ok to try again. please i need help.