@5ciFiGirl
To avoid name-collisions, you'd want to use a longer HashTag and maybe also underscores since they're usually not used in normal HashTags. Such as:

#by_yourUserName

.
#MastodonTips #HowToMast #HashTags #Search

@5ciFiGirl
One thing that can partially help:

On the profile page there are 3 tabs.
- Posts
- Posts and Replies
- and Media
"Media" shows your posts without any boosts, but only if they have a picture attached.

.

Another thing that works well, but requires planning:

On one of my other mastodon accounts I took a preemptive approach and put a specific hashtag in all of my own posts, so I can find them using that.

For example:
#by_yourUserName

#MastodonTips #HowToMast #HashTags #Search