No idea who this is

I'm completely stuck with this coin.

Could someone please help me out of my misery by identifying who this is

In exergue, on the reverse, the mint mark is CTΩ or CTΔ

 

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I can read GETA to the right of the bust.

 

And, it's a little hard to read, but Nikopolis on the reverse.

Appears to be this type:
https://www.acsearch.info/search.html?id=2843126

Roma Numismatics' description (link above), slightly edited (format/labels):

Geta Æ32 of Nicopolis ad Istrum, Moesia Inferior. AD 209-212.
Obverse: AVT K Π CEΠ ΓETAC CEB, laureate head right /
Reverse: OVΛΠ NIKOΠOΛEΩC ΠPOC MECTΩ (sic), Dionysos, naked, standing
left, holding bunch of grapes and filleted thyrsos.
References: Moushmov 1177 var. (legends); Varbanov 3276 var. (ditto); AMNG -.​

 

Nice coin and nice of you Curtis to help out.

 

You guys are awesome! thank you so very much @Victor_Clark and @Curtis. Now I can rest assured.

 

Also, the lettering in exergue isn’t really a mint mark. Rather an extension of the reverse legend. FYI

 

Have been reading the Moshumov entry at wildwinds:
https://www.wildwinds.com/coins/moushmov/nikopolis.html

Since on the reverse of the coin there is clearly a caduceus, I think that it is the reverse shown on Plate XI, No. 2:
https://www.wildwinds.com/coins/moushmov/plates/large/XI.jpg
Hermes naked, standing mantle over his left hand, holding purse and caduceus

But this is a reverse of Septimius Severus, there is no entry for Geta with this reverse

Does this mean that they used a Septimius Severus die for the reverse and the obverse die for Geta?

 

Good catch! Yes, the caduceus definitely makes that Hermes w purse. Here's a example of your type with the corrected reverse: https://www.acsearch.info/search.html?id=8635148

Nikopolis coinage is complicated -- and so is Moushmov's reference! I'm not exactly sure how Moushmov type nos. work, but as I recall, if the same reverse is used by multiple emperors, it's usually just shown once on the plates.