Basically, Dawn,....anybody who sins against the "holy spirit" doesn't have a chance for forgiveness.
I think Jesus told a couple of folks they could forget it (see above). But these were extremely few in number and were usually those who held positions which they used to purposely lead others to ruination.
Also,
If God directly kills you, IMHO, I don't think you have a "snowballs chance" of coming back. From what I have read, only a few have been direcly taken out by God....usually for having the gall to "sh*t on" him, if I may use that expression in polite comapny.