Slight ache in my upper right side of chest when i look to the right haven't done any lifting or anything ?

Muscular: pain. sometimes certain things you may have done that do not catch your attention can cause muscle spasm

Nothing serious: possibly some information on a sprain and likely to go away in a week or so

Muscle strain: Most episodes of neck muscle strain (or other soft tissue strain or sprain, such as ligaments or tendons) result in a stiff neck and/or pain in a shoulder muscle. Symptoms typically include difficulty and pain when moving or rotating the head or neck. Do some stretches and you will be fine.