Hi Kal, I am so sorry you are going through this and has already been said you are certainly not alone, my hubby and I have suffered OCD for years me at one time so severe I do not want to go into details, and why I do not come on this section because I found it would effect me to talk about it, I had a breakdown and it was clinical depression that caused it, so it did fade and I slowly recovered after a very traumatic four year period, with treatment and self help, but it did leave me prone to bouts of what you describe still coming back, (blasphemy words in the mind) at the time I was convinced I had sinned against the Holy Spirit I was in a terrible state, but my hubby who is also Christian really helped me to see that this was not so as was explained very well by poster WarrenX, and helped me see that we are hidden in Christ.
One of the things that really helped me and still does when I am having anxiety and can often happen again, Is to constantly put positive words over them, the most beautiful praisworthy words, such as LOVE, HOPE, FAITH, ENDURANCE, GOODNESS, any word that will counteract negative words, this really works for me. Then I don't worry about it happening because those other words are more powerfull, I just see them as an enemy that is to be vanquished by the Lords words and not me saying them. It has helped it happen so much less, I also know it is important for us to constanly rely on the Lord, prayer, read His word and be careful what we read and watch for entertainment.
Phillipians 4 v 8 & 9 '
8 Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things. 9 Whatever you have learned or received or heard from me, or seen in me—put it into practice. And the God of peace will be with you.
I hope I make sense, I will be praying for you for the Lord to give you strength beyond all human capasity and to work powerfully and miraculously into your life to overcome and overthrow, all that is coming against you. Every thing is possible with the Lord we must never give up believing that he will help us conquer and will lift us up and make us soar as on wings of eagles, this is his promise to us.
Read all of Isaiah chapter 40 and Ephesians 3 v 20