Unforgivable Sin? Please Help.

Hi everyone, I just wanted to ask a question. About a month ago I was thinking about the Unforgivable Sin, and in my mind I thought exactly what the Pharisees said to Jesus. This wasn't an accident; I said it in my mind but I certainly didn't believe it. So now I'm really scared and I'm thinking that there is no hope for me. So I searched it up on Google and all the articles said that if you are worried about it, then you haven't committed it. This didn't comfort me much. I read through my Bible and I came across Jesus saying that he will never cast out anyone who turns to him (John 6:37 I think). This comforted me a little but I'm still worried. I'm really sorry for it and I have asked God to forgive me. That was the dumbest thing I have ever done and I wish I could go back in time and undo it. I know that's not possible, and I'm really scared. I've messed up a lot and I just want God to forgive me get my life on the right track. Is there any hope for me?