normal to irregular

So just recently my period has been irregular.... we been trying to conceive since October... And since the beginning of the year my period been between 35-45 days apart ... I told the Dr she said it is nothing to worry about... but when I see people who wouldn't be fit to be a mother pregnant it kills me inside... I wish I would be able too. I am a day late according to one app and 9 days late on another I want to hope i am but I don't want to get my hopes up... it sucks cuz my back is hurting and stomach is cramping like I am on it... I cried last night to my husband when we should be happy because we might get a house by next month.