Yikes! Denise, I do hope those lumps are something like fibercystic breast disease, both my mother and my sister has that, the lumps are always benign - but they can get them checked! Please take care of yourself - there isn't a clinic nearby you can use?
Sheri, do you not use a saline flush followed by heparin (the blood thinner)? I had to do that each time. Saline first, then the antibiotic, then saline to clear the line again, then heparin. It's not the same as the blood thinner given typically, but specifically for PICC lines. I have absolutely no idea if it would be appropriate for your treatment, but it worked well for me - although it did mess with my period (yes, at 53, I'm still getting a regular period!!).