The Unforgivable Sin

I have a question that I need answered, I am fearfully worried for my salvation!. Some time ago I went through some spiritual problems - One such thing is that I started reading about the 'Unforgivable Sin'. I felt I had comitted it!. I started reading about it and asking questions, I got two responses - 1) It was a Demon - making me believe I had done it. 2) It was the Holy Spirit - making me realize my sin and need for repentance hence the worry. I pondered for weeks over this e.g. How can people give two opposing responses. Then one day under my breath while working it out I said 'The Holy Spirit is Like a D****' I didn't think anything of it at the time as I was basing this statement on a vauge view of the Holy Spirit and Demons. I am worried that God will have taken this the wrong way - In my confusion I said this - That being said I never ever, ever meant it in the connotation that the Holy Spirit is evil. The statement was mearly me working out how to tell them apart. E.g. If some christians said number 1 and others number 2 then my reasoning is there must be some aspects that are undisernable. We are even told to Test the Spirits which would mean comparing them and even finding Similaries otherwise we would not need to test them in the first place. I am fearfully worried God will not understand what I mean? Can someone tell me weather I have committed this or not?