Tmac4686 go to your doctor now.
I had a hernia op on my stomach 18 months ago, all OK.
Yes it hurts and pulls for a while and you are always paranoid when lifting.
I am a window fitter(40) and do lots of heavy lifting, twisting and pulling even now I still place my hand on my hernia when I cough,comforts me but is not needed.
12 years ago I had testicular cancer stage 1 and had a testicle removed.
My symptoms were an increased size of my left testicle, very dull throbing pain in left testicle when bending or straining but no pain if touched or squeezed.
I had no problems with the removal or afterwards other than steady lifting for a while after the op.
Unfortunatley 1 year later in my routine checks(ct scan) I was diagnosed stage 2 of the cancer(kidney nodes) and had a Very large op to remove the cancer.
This op was harder to recover from as I was cut down my stomach from my brestbone to my groin, but no real problems 2 weeks in hospital 6 weeks recovery at home then slowly back to work with minimal lifting for a month.
No problems since then thanks to great after care by Warwick hospital.
My advise to anyone with a swollen testicle is to go to the doctor straight away.
The longer you leave it the more chance of getting stage 2 ,which is a lot more serious.
Good luck I wish you well,
Gavin