or,
Being nervous, I sometime can come off as bit awkward.
recasting the sentence (and making it, what is the word? OH, i know a little less anastropic, helps.
Ohh, I would be very surprised if Faldage wants less AnnaStrophic!
it's just a bit chunky rhythmically, but it's clearly understandable.
It's not like the "coming off" was done awkwardly, it's the "I" that seemed awkward. I don't think so, Faldage. Come off in this sense, although it equates to "be" or "appear", is actually an action verb and thus would take the adverbial 'awkwardly'. I can appear awkward, but I can come off awkwardly.
EDIT: I should have said "it's meaning equates to "be" or "appear".
I have issue with the "come off".
What a peculiar (and awkward in itself) idiom!
How about a rework:
"There are times (they occur more frequently than not) that I find myself extremely nervous and unsure. At those times my post can give the appearance that I am of an awkward nature. Although, that is not truly the case."