Another day another test

So, back in November, they found a lump in my right breast and that I have Hashimotos disease.  They told me not to worry.  They'll watch the lump and I should be retested in May and gave me medication for the thyroid.  Then, at Christmas, I found another lump on the left side of my neck in my gland. I start watching it and it never goes away.  February, they find that I am still not on enough medication and prescribe more.  Then, in March I found a small lump under my arm next to my left breast.  I asked my doctor to prescribe antibiotics (which he did) because I am desperately hoping for Mono.  Today is my follow up and blood work.  I have to admit, I am a little scared.   What if I don't want to know?