Can God’s mercy cover such blasphemies?

For some time now, I have believed that I suffer from OCD, thoughts that I do not want but are there. I had several blasphemous thoughts, including “Jesus is demonic” or “God is a Satanist.” Each time, it was always those thoughts. Sometimes it was because of my OCD, other times because of impulses (which I did not want but were there, and the more I ignored them, the stronger the impulse to think them became), and other times it was me (I thought them, but not as they are, just thoughts, with no intention to offend or anything, they were simple). Once, I also had blasphemous thoughts against the Holy Spirit (not insults, true blasphemies, but more than anything else, this was caused by my OCD and my impulses), and I have been thinking, can God still forgive me? I am filled with guilt for every time I thought wrong things about them, and it saddens me now, because sometimes I thought them myself. I try to remember, and it saddens me, because I know that God or Jesus is not like that. I know it is my fault, and seeing it this way makes me think that I will never be forgiven for such blasphemies.