just purchased a two year old home in october and twice now I have had problems with the toilets not flushing. This morning when it happened both showers in the house were in use, and i could hear the toilet in my room making noise (bubbling?). When i got out of the shower I went to the toilet to flush it and the water just rose to the top and drained very slowly out. The same thing happened when I tried to flush the other toilet. None of the other drains (i.e. sink, tub) had problems draining. I went home for lunch and the toilets were flushing fine again. Is this something I can correct myself, or is it a sign of impending proplems. I have a spetic tank and I am not on city sewer. Thanks for the help