Hello friend, welcome to HCM,
As you have mentioned that you ve sever myalgia(muscle ache) and arthralgia(joint pain), it can be suggesting many causative factors like: stress
, any recurrent infection as you ve mentioned that its a recent thing to occur so infection can be the cause like influenza
and rhematic fever; osteo arthritis, old case of polio
, rhematoid arthritis, degenerative arthritis
Its better for you to go for certain test and investigations like ANA, muscle biopsy
Scans of body, Quantitative immunoglobins and consult your near by good physician with results of the scans and tests.
Painkiller which you are taking right now is helpfull but to certain extent, so consult the good physician or any alternative therapist.
Besides that start doing breathing excercises and stretching excercises with certain dietry measure like increase intake of milk and plenty of water.
I wish you a speedy and healthy life ahead. take care.