Thanks for providing more information.
Sorry for late reply and inconvenience.
Firstly i want to assure you that chances of Chlamydia infection are less likely in your case as you have no associated penile discharge,frequent urination.
Now as you have neck stiffness,itching.tingling sensation in forearms,pain in armpits,headache so all these symptoms are suggestive of Cervical spondylosis(compression of nerves at cervical spine).
Other possible differential diagnosis of itching/tingling sensation in forearms may include Neurodermatitis.
So you can apply 1% hydrocortisone cream on affected area.
And Take Cetirizine.
As you have dry skin so apply calamine lotion just after a bath.
As you have few episodes of loose stools so possibly there could be some sort of stomach infection which can also result in generalised body & joints ache,low grade fever,headache,tiredness.
So you can take metamucil.
And start multivitamin.
Take OTC Motrin.
If your symptoms'll persist make an appointment with your GP.
Hope this helps.
Please rate me high if you are satisfied with our conversation.
In case you have further query press reply to expert button.
Bonus and positive feedback are appreciated.