Please help me, share your thoughts.

My husband found a lump in his testicle last week. He went to the doctor last Friday, they sent him for blood tests on Wednesday this week and this morning they’ve called and said he needs an urgent ultrasound scan but the earliest they’ve got is next Thursday 😔 they haven’t said what they’ve found in his blood test, it’s all just scary words like “category 5 emergency ultrasound” and “issues with your blood test”. I know I shouldn’t worry until we have something to worry about but I’m so scared of what this means. Do you think there’s any chance it’s not the big “C” word? Does anyone have any similar experiences? I’m terrified and hate that we have to wait so long for answers. We have a 3 year old son and 7 month old daughter and I’m scared of what the future may hold and what this means for our family 😔💔