Welcome to Healthcare Magic Forum
The symptoms you are experince are of ANXIETY
. The episode you had long back, has created a very deep impact on the mind , and not letting you do your activities as you did earlier.
If you think the room isnt clean enough, then you should make sure that it is done, or do it yourself, (evn better).
Regarding presence of infection, a simple blood test
will show , if there is any.
If not, then its is confirmed that this 'low immunity" is not in the body but in the mind only , which can be treated by a little self-reassurance, positive approach to things and may be talking to a conselor.
Rememer , the power of mind is much much stronger then any medicine.