Computer illiteracy

I get so frustrated with blogging. I posted something a couple of days ago, and know it is out there, because someone commented and it forwarded to my e-mail. But if I pull up my blog on my computer that latest post isn't there. I tried clearing my cache, and I think I did it right, but still don't see that post. I've re-published the whole blog twice in the last couple of days. Anyone know anything else I'm doing wrong?