I had a blighted ovum in Feb, and went with medication to induce the miscarriage. I know how hard it is, and exactly how you all feel.
I got pregnant on my 3rd cycle after my mc, as the first was really irregular, the second was close to normal, and by the third my body had settled back to its normal routine. My Dr said that I could try right away, but BECAUSE the cycles are so screwed up, it makes it very hard. We did try right away, sortof. I never tracked my ovulation, and didn't use a monitor or anything, so while we weren't being careful, it is doubtful that our timing was good because my cycle was so whacked.
I also though that I would never be able to have a baby, and in the period after my MC, my best friend got pregnant and my SIL got pregnant. It was so, so hard being happy for them, because it just reminded me how sad I was. However, now that I am pregnant again (and have a hearbeat), I am much, much happier.
And, yes, blighed ovums are FLUKE things. It is very unlikely that a person would have them 2X while trying to conceive, much less back to back.