I think its modern Fake Phoenician hemidrachm from Arados. But I recommend seeking out a specialist and certification, that's the only way to be sure.
Found with the same reverse, but the bust should be crowned.
ΘMP its the year 149 in Aradian, so 110-111 BCE
The coin should look like this.

or look like this

Reference 1
Reference 2
Reference 3
Reference 4