What Causes Delayed Periods And Abdominal Pain During Periods?

Hi, may I answer your health queries right now ? Please type your query herehi. i am 33, had ectopic pregnancy in 2005. now trying for baby for last two months. usually my period is regular(1/2 day late each month). but this month i have had my period after 46 days late from my last period first day.( on august,i got period on 12th, on september i got it on 28th). besides, since last two months( i am trying for pregnancy), my each period has accompanied with very much abdominal pain which never happened me to before. i want a baby very much. should i go for IUI or IVF?...