Recently had 2 emails, stating from me, to me, with my full email address as sender, titled with date , time and document. Document shows on opening page, but illegible writing on what looks like an official form. It says to download, which obviously I won't do. First one dated as sent when I was on computer, second sent in early hours last night when computer and modem were switched off. The sent folder in outlook does not show them.

Worried some virus has got in, any ideas ?