common things happening commonly, excluding strange exotic illnesses or two separate illnesses at the same time,
neck lymph nodes swollen = infection
chest tight = very sticky phlegm or airways disease exascerbation (ie mild infection pissing your asthma off or something)
general weakness = secondary or tertiary to infection usually
drawn/pale = dehydration/poor eating usually, but may be blood pressure also
youre probably in the early stages of some sort of respiratory infection. keep your fluids up, eat well, rest a bit more than usual, and monitor for the next 24-36 hours, when youre either going to have onset of more defined symptoms or itll pass
a couple Qs:
when did it start?
what was it like when it started?
hows your eating/drinking?
temperature?
any itchiness?
any stress/lack of sleep lately?
any new drugs lately?
been around anyone with bird flu lately? (kidding

)
(no im not...have you?

)