Hi summerrains
Sorry you've had to go to breast clinic, and sorry you've come away not feeling particularly reassured.
I had similar experience back in Feb of this year - lump, pain, registrar doctor examined me, sent me for ultrasound (too young at 38 for mammo) and told me absolutely nothing to worry about. I did ask, upon leaving the room, well what is the lump, to which she replied "not sure, probably an enlarged milk duct" (I've not breastfed for 4 years now).
After my initial relief, doubts started to creep back in and I started a whole thread about whether I should get a second opinion (not sure how to link but if you do a mumsnet search along the lines of 'breast lump second opinion' you'll find it). Lots of reassuring posts and, ultimately, I haven't sought a second opinion. I wondered why my lump couldn't be seen on ultrasound, or if indeed doctor had even felt it. I ended io requesting my clinic notes to try and reassure me.
I now take starflower oil for the stabbing pain (stronger GLA content than evening primrose) and it's almost disappeared, I still get some twinges every now and again. Lump still there, I religiously check my breasts each month, particularly lumpy area to make sure no changes there.
I will try and link to my thread in a new mssg so you can read for reassurance. Also, I visited breast clinic 2 years ago about same breast with no lump but underarm pain radiating into breast. Again, nothing found but I suspected carrying a heavy toddler on that side might have caused it. Stopped doing that and pain went away after some time (then I got the new stabbing type pain 18 months later
.
I think my left breast is my 'naughty' boob -always produced too much milk when breastfeeding, always the one to hurt or feel lumpy. Gah, bloody boobs!