Monotheism or polytheism?

I have finally come to accept after viewing the evidence that the Old Testament is very clearly polytheistic, and this has unfortunately completely rocked my faith. I no longer know what to believe or who to worship. Should I convert to Semitic paganism or do I try to reconcile these facts with my Christian faith and remain convinced of the existence of a singular triune God ? I still believe in God and Christ, but I now no longer know anything about the structure of the divine! Is there really only one God or are there more I should be acknowledging? How do I move forward from here?