What could be going on in my house?

[Dionysus]

For the longest, I have been having extreme fatigue/drowsiness off and on. It's worst during the summer and morning and early afternoon at home. My family just accused me of being lazy or being depressed. Two springs ago I also developed chronic sinusitis, that's also worse during the spring and summer. It's a debilitating fatigue too, often times even a lot of caffeine or exercise won't make me snap out of it.

Within the last few months my mom has been complaining of fatigue/drowsiness and headache which is worse in the morning too.

Now, everyone in my house is complaining about these symptoms.



We now ASSume that something in this house is making us feel bad.

I heard this is a common thing, but I heard it can be caused by MANY things. We don't know where to start. We're not using the heater, so we don't think it is carbon monoxide poising. We do a lot of dusting, so I don't think it is that, HOWEVER we do have a very old vacuum cleaner. I heard old vacuum cleaners stir up a lot of dust.

Has this ever happened in your household? Did you ever figure out what it was? And how did you find out?