As others have said, maybe you are worrying to much about the money, and at some level this will affect most poker players. For instance I dont think, any player can go into the main event final table and not be even just a bit affected by the massive sums at stake.
However these hands are from a 55c MTT, so its not exactly like, you are playing for something life changing. So honestly this sound like a mental problem, and I cant assist with that. Only you or maybe your psychologist can tall, why you are reacting in this obviously irrational way.
As a side note the going does tend to get tougher, when you run deep in tournaments. This is because, most of the bad players are now gone, and those few, who are still left, begin to take it more serious, when the final table is in sight. So you are much less likely to receive random gifts of an entire stack, as often happen early in low buyin tournaments like this.