Can I become sick  by smelling my septic tank inside the house? The whole mobile house started smelling very bad about 6 weeks ago. I had a friend go into the crawlspace to check it out and he reported back with news that there is allot of standing sewer water under there from a "tweaked" pipe. It started about 5 months ago but became almost unbearable recently. I have had upset stomach, dizziness and can't stay awake during the day. I have fallen asleep while sitting and standing up and have to sleep around 10 to 16 hours every day total day and night. All this isn't normal for me. Should I pay several hundred dollars for a plumber or invest the money into doctors to find the problem? It may sound stupid but for me... This is a dilemma.

Summarized question: Is it possible to become sick by smelling my septic tank inside the house?