Looking on the internet deeply has found these results:

I myself went to the store. is the most popular phrase on the web.

She and herself baked pancakes. 10 results on the web	I myself went to the store. 13 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Jun 16, 2009 ... or "I myself went to the store." "H�gu mu�angu/�umangu nigap." = "You were the one that swam yesterday." or "You, you swam yesterday. Jun 1, 2009 ... or "I myself went to the store." "H�gu mu�angu/�umangu nigap." = "You were the one that swam yesterday." or "You, you swam yesterday. ... RESPONSE. No. You can write, "I myself went to the store" or "I went to the store myself," but that comma after the subject, all by itself, is just asking for trouble.

She and herself baked pancakes.

10 results on the web

I myself went to the store.

13 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Jun 16, 2009 ... or "I myself went to the store." "H�gu mu�angu/�umangu nigap." = "You were the one that swam yesterday." or "You, you swam yesterday.
Jun 1, 2009 ... or "I myself went to the store." "H�gu mu�angu/�umangu nigap." = "You were the one that swam yesterday." or "You, you swam yesterday.
... RESPONSE. No. You can write, "I myself went to the store" or "I went to the store myself," but that comma after the subject, all by itself, is just asking for trouble.