Albatross is right, I "third" his suggestion.
Finish your training, what you are scared of is part of the skill of being a helicopter pilot. Have confidence in your abilities, you have 100 hours, you are well on the way. Enjoy the skill of a good EOL.
There are plenty of EMS operations which fly twin engine helicopters, you should strive towards and visualize yourself as flying a twin only.
Don't give up, you have come this far. Relax, enjoy your training with a new school and move forward.