No, I believe in the Godhead of The Father and The Son. A duality Godhead of two beings.
1 John 1:3 (KJV) That which we have seen and heard declare we unto you, that ye also may have fellowship with us: and truly our fellowship is with the Father, and with his Son Jesus Christ.
1 John 2:22 (KJV) Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
Anyone who believes in a Godhead of more than two beings or less than two beings is antichrist. Belief therefore in a triune god or a monogod makes you an antichrist.
Many say they 'believe in god' as you have appropriately written above with a small 'g' and of course they do believe in this mono god with unquestionable devoutness and sincerity, but all is in vain for there is only one mono god - the god of this world - Satan the Devil.
Monotheism is one of the Devil's greatest deceptions. The trinity being the other.
Even the term "Oh My god" is a declaration by lost and unsaved people who are telling us openly that they believe in the Devil. The use of this term is not blasphemous for all they doing is telling us who their god is - and it certainly isn't the Godhead as I have described above.