C4 ends? (ZombiU)

I found c4 for the first time, blew up a few heaps of garbage and that's it .. Perhaps, of course, the fact is that I died several times, but I no longer have c4.
Damn, if it ends, the developers could somehow hint about it, now I'm in the middle of the game, only I came to the location with the nursery and I have no explosives. Is it worth playing further or starting a new game? After all, she will probably be needed according to the plot, right?
Or will I still find some explosives?