Hi im 16 and my girlfriend and I have been having unprotected sex (well shes protected) for a long time now and we are both each others first and last.

I have however in the past two days noticed that my testical hurts round the back of the right hand side one. I have felt and feel nothing (i.e. lumps) however I seem to think its coming from the cord that connects them to the penis. If I feel it, it sends a sharp pain through the cord and then for some odd reason up my stomach.

Any idea what this is cause it bloody hurts sometimes