It's a smelled of wormwood.

I was full of anxiety and frustration that the time, but when I smelled ithe taste , I feelt comforted and calmed down.

It's made of houndstooth fabric, and looks like a pyramid with round.

Not sure what you meant when you said looks like a pyramid with "round." Sorry I don't know how to correct this sentence.

I takebought it for twenty yuan and haung it on my canvas bag.

or you could say "I took it for twenty yuan..."

It's a smells of wormwood.

At the time, I was full of anxiety and frusration that time, but when I smelled the taste caught the scent, I feelt comforted and calmed down.

Taste is a word used to describe things that are edible e.g. the cake tastes sweet, the curry tastes spicy, the coffee tastes bitter.
Scent is a word used to describe the way things smell e.g. the scent of wormwood

I takebought it for twenty yuan and haung it on my canvas bag.

Past tense

A sSachet

We capitalize the first letter of important words in a title.

I bought a plain sachet in a book store today.

It's a smelled of wormwood.

I was full of anxiety and frustration that the time, but, when I smelled the taste sachet, I feelt comforted and calmed down.

The smellfragrance conveyed a non-verbal message to me.

US alternative

It's made of houndstooth fabric, and looks like a round pyramid with round.

I'm not sure what a "pyramid with round" is, so this is my best guess at a correction.

QIt's quite good-looking.

I takebought it for twenty yuan and haung it on my canvas bag.