If the lump between your scrotum and leg is getting bigger then it is either an abscess or a cyst. It can also be a swollen lymph node. Yes, this needs to be investigated immediately as you also have a lump in the testicle. The two lumps may not be inter-related, but it is important to find out the nature of both the lumps-through ultrasound, clinical examination and may be a CT scan. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.