Hello and welcome,
Thanks for your query.
From your description, there could possibly be a necessity to visit a doctor. First, because you experienced numbness
and this could be a sign of some kind of blood vessel injury
, possibly caused by either muscular or injury to the bone.
Bruising is not necessarily seen when there is an internal injury of sorts. As you have also mentioned the financial limitation, I suggest you at least get an x-ray of your shoulder done to rule out fractures
of any kind.
If it is a muscular injury, it should slowly be relieved with time and a few pain-killers, also it is very important that you keep your arm immobilized.
Do take care and visit a hospital at the earliest on development of any new symptoms.
I hope I have succeeded in answering your questions, you could write back to us anytime for further clarifications. Wishing you good health. I hope your injury is mild and wish you the best.