I used to have my cycle every 28 days for about 5 days. Now over a year after my 3rd child, my cycle is every 23-24 days and starts off stop and go spotting for the first 3-4 days, then really heavy for 2 days, then moderate for about 2-3 more days. I am trying to conceive, and I am not sure, with this cycle, when I may be ovulating?