Doubt #7 We cannot believe in three G-ds

Believing in Yeshua does not make one believe in three G-d's.  There are three persons in one divine being.  This is described in Isaiah 48:16 (verse 17 goes along with verse 16). "Come ye near unto me, hear ye this, I have not spoken in secret from the beginning; from the time that it was, there am I :  and now the L-rd G-d , and his Spirit hath sent me,  Thus saith the L-RD, thy Redeemer, the Holy One of Israel: I am  the L-RD thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go".  The L-RD your Redeemer, the Holy One of Israel is speaking  and saying that  the L-rd G-d and his Spirit has sent him.  The three persons of the G-d head are clearly seen in these two verses,1)- L-rd G-d  2)- his Spirit  3)-L-RD(thy Redeemer, The Holy One of Israel).   Also the shema Deuteronomy 6:4 describes G-d as a compound unity with the word "One" used