no worries bodengroupie, tis the reason I went into natural meds, fed up with apathy from modern med practitioners.
I was ill for 3 months and getting worse by the day, I was told it was in my head in the end and I should ''buck up''. went to a natural practitioner who did a simple blood test and found I had a parastic malarial infection and after spending 3 months off work, 2 weeks after starting her treatment regime I was back at work 1 day a week, then 2 days until 10 weeks after treatment began, I was back to work full time, I was so impressed I bought into the idea!! whatever the symptom, there is always a cause whether it physical or pyschological, either way it needs to be investigated and treated. often the 2 intersect too, pyschological symptoms can become very real physical reactions and vice versa but very often, it is something simple that has caused a cascade effect and the original cause becomes overshadowed and is not found.
it may be with your alien daughter () then, that she was affected by a pollen or other allergen or even a bug or virus around easter that caused an exxagerated reaction on top of her usual bunged up nose that led to the lymphatics becoming extra clogged. it can take several months for the lymphatic system to get back to normal without help which would fit the timescale you mention.
as a treatment for myself, I use New Era combination Q tissue salts. they are a low potency homeopathic treatment. I do not practice homeopathy and I am scepticle of it but these do really work for me and many people and can be taken daily with no side effect. if I get a bad day I do use other, stronger stuff but I find that if I keep this up, I have few problems. (my sinus above my left eye was 'nicked/cut' somehow when I was 7 during an adenoid operation). so, never settle for being thought of as paranoid 9 times out of 10 you will not be and the other time, well, everyone is out to get you at some point in your life !!