Possible clot above port site, and CT scan after rads

[Brenda_D]

They have never been able to draw blood from my port, and didn't seem too concerned about it, since they could administer my chemo and Herceptin, and flush it ok.
I had my 3rd Herceptin last Wed, and felt some chest discomfort, and dull ache on the port side, around and under that arm. On Friday I just felt a little "off' and took a nap. When I woke up, my neck hurt a little and I felt a lump at the base of it. I looked in the mirror and could see a good sized lump, that looked like it contained fluid.
I called my GP's office, since she deals with that stuff for me, and she was out, they recommended I go to the ER because is was directly above my port.
At the ER, they did a CT, but could not exclude a vein thrombosis, so I go back for a Doppler on Monday. They sent me home with an antibiotic (just in case) although blood did not show high WBC counts. (They were in fact low, possibly due to the recent Herceptin).
They didn't seem too worried, but I still have a large lump at the base of my neck. :0 Possible clot isn't supposed to worry me?
I got copies of my CT scan and report.
I popped the cd in and took a look. Of course I don't know what I'm looking at as far as the veins. I can see the port and where it threads into my vena cava.
On the other breast, I could also see what looked like "sprinkles" (for lack of a better word), above where I had my lumpectomy. When I went down through the scan, those spots lit up as star bursts. I'm wondering if that could be radiation residue? I just finished rads about 3 and a half weeks ago.
They did not use any type of seeding for rads, tho, and it is not directly on the lumpectomy site, but at the side of the breast where it meets the arm.