Hello & Welcome to HCM
had gone through the case.chest pain
with laughing is might be muscle spasm,for this you can take any mild pain killer for 3 days,it will disappear.But the another symptoms are sign of Cervical spondilitis. For conferming it you take one digital x-ray of cervical bone.After the diagnosis you learn some basic neck exercise by any health instructor.If needed then take medication by doctor. Hope so this advice will helpful to you.
thanks & regards
Dr Soni Verma
HOmoeopathic physician & Life style conselor