Contact your extension agent, they can help you determine exactly what is going on.http://harris-tx.tamu.edu/
I searched on google for "texas, cooperative extension agent, houston"
The extension agents in many states can help with pests problems. Once they give you the information, you can decide how to act to treat the problem. Some may recommend pesticides, etc. Each person has to choose the path they follow. Choosing pesticides can have an affect on you, too and our world.