Experiencing Sharp Pains In Scrotum & Abdomen

I was having a dull throbing pain in my lower left back for a few weeks it would sometimes make me feel nauseas.
Thin started to feel pain in my left side and lower left abdominal area as well as testicles. I thought it might be kidney stones so I went to the doctor and they checked for blood in my urine. There was no blood so I had an ultra sound of the spleen done and it came back slightly enlarged. I was then sent for a blood test and was told I have mono. I am 33 years old. I havent had any symptoms of feeling tired but still get sharp pains in my sides occasionally pain in my scrotum and abdomen. I have also been feeling bloated like my stomach is strechd out does this seem like mono. I will also feel a dull throbbing pain in my upper thighs occasionally.