uti or ...?

i have been having this weird pinch-like pain sensation near/in opening of my urethra for quite a long while now... about couple weeks...however, i do not have the same burning sensation as with a uti or the urge to urinate... i am prone to utis and have had several... so i don't think its the same... i had gone to a walk in clinic to check for a uti but the test came back clean... so im wondering what is causing this weird pain... I am sexually active with a steady partner... i thought this was maybe an imaginary uti as some people have mentioned... but this pain jsut isn't going away... I don't know what is causing this... any ideas??