Answers
Have I committed the unforgivable sin?
The people who ask this question are almost never the people in danger of it. The sin Jesus named was the settled, deliberate decision of men who watched Him heal and called the Holy Spirit's work demonic — a hardened refusal, not a moment of panic, a stray thought, or a shouted word in grief. Fear of having committed it is evidence of a conscience still alive, and a dead conscience is the actual condition described.
Go and see for yourself
Wherefore I say unto you, All manner of sin and blasphemy shall be forgiven unto men: but the blasphemy against the Holy Ghost shall not be forgiven unto men.
Matthew 12:31
All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
John 6:37