It looks like u r having irregular periods. Have u been seeing a gyn/doc regarding ur conceiving problem and did u find out the cause like whether it's ur
1) hormone problem (not stable)
2) insufficient iron, vitamins, calcium (healthy body)
3) age and fitness level/weight/ bmi issues
4) fertility problem by u/ur husband
5) side effect from other medication or health issues
6) previous injuries/accident leading to health issues
7) simply stressed up in work or trying to conceive
8) not ovulating
9) others...
There are many reasons for not being able to conceive...
Find out the cause and then god bless u with an angel baby........ Soon!