No, you weren't. A common false-flag (https://en.wikipedia.org/wiki/False_flag) attack involves presenting oneself as a member of an opposing viewpoint in order to find adherents for the desired viewpoint.
The tell is your use of the words "misinformation" and "propaganda." People who tend to levy such claims also tend to share more of it: https://www.colorado.edu/today/2020/06/17/who-shares-most-fa... - "The paper, in the journal Human Communication Research, also found that people who lack trust in conventional media, and in one another, post misinformation more often."
I was always pro-vax, and that hasn't changed with this vaccine.