I'm 21 years old and have never been able to ejaculae from masturbating

I have a small ball like thing in my scotum (I imagine a cyst) and have had for years I also have a very low sex drive, is what I think is a cyst the cause? has anyone experienced similar problems?

I have never been to the doctors about it because of the embarassment but I have finally made an appointment for next week - just wondered if any of you guys have had/got this?