Can you use ammonia to kill fleas?

YES! Ammonia does kill bed bugs on contact. However, i am unsure if it kills their eggs. I recommend that you pre-wash any clothing bed spreads that may contain eggs or bed bugs in ammonia and following a regular wash.

The most effect yet costly way it to get a professional exterminator.

while they are costly, it is the only and most effective way to be sure you are free of bed bugs.

New Technology allows same day treatment to your entire home, you may just need to toughly dust and clean when its over.