NeuroTalk Support Groups - Strange symptoms: burning muscles/tingling arm, leg/"weak" arm

Hi everyone, thanks for reading my post. 30/yr old fit male here. I sustained a blow to the head almost 5 months ago. I had a mild to moderate headache for about 3 months, which gradually faded and went away.

However, about three days after my injury, my right arm began to tingle and feel "weak" or uncoordinated. I can lift as much as ever, and I can type, play the drums, etc., but my arm just does not feel right. The severity of this comes and goes--sometimes I feel 95% okay (but this is usually fleeting), sometimes my arm just feels very floppy. After a month of two my right leg began to tingle as well.

Two months after my injury I began to have a burning pain in both triceps--this lasted for a couple weeks, then went away. After a while the burning returned, but only in the left arm. It has remained there, except for the couple of weeks when it disappeared. Sometimes the pain is burning deep in the tricep muscle, sometimes the pain is a shooting pain, that is concentrated in the bicep. Sometimes the right arm and leg will have this pain, too, but not usually.

Sometimes, but not as much lately, I will get a mild, strange feeling headache that is accompanied by a certain "fog"--I can still do most activities, but I have a desperate, far-away feeling. I'm not dizzy, but I'm definitely not normal and it makes it hard to do most tasks without using extreme concentration.

I also started to have groin and testicle pains, which the doctor said was epididymitis, but I'm including it here in case it is relevant, because it seems very odd--I've been so healthy my whlole life. I've had this for two months, and antibiotics did not help.

I had a CATscan at the ER and it was normal. I had a general reflex test (follow the finger, grip my hand, etc.) and that was normal. I had a neck MRI and that was normal. The neurologist and ER doctor both seemed unimpressed, but I am freaking out because it's been going on for so long. I am worried that it's going to get worse or that it's going to spread. If you have any insight, please post it here. I am also posting this in the Peripheral Neuropathy forum as well, because I"m not sure where to turn. Peace.