Have I screwed up?

Hi RedSquirrelsNuts, sorry you’re having this worry, both the potential clot and re lympheodema. I think I’d have been the same as you in that the worry about the clot would have overridden concerns about  potential lympheodema. I’m not sure it’s a high risk anyway, no medical person has ever shown much concern over it with me, regarding taking blood or giving vaccines. And if it’s any comfort, a friend of mine had breast cancer before me and her other arm had been paralysed years before in an accident, so she used her cancer side for everything (including having blood taken) as she had no choice. She never got lympheodema. Also, there are several people on this site who have had double mastectomies or lumpectomies, who again have no choice but to ‘use’ one of the arms for bloods and injections. 
I hope all is well re the clot, keep posting and let us know how you are getting on. Love and hugs, HFxx 

Thank you so much! That makes perfect sense, and sets my worrying mind at rest.

The D-dimer test was negative so it isn't a clot, "just" neuralgia. It's a bit better today so I suspect it's just something I'm going to have to live with, and keep checking when it flares up just in case.

So happy your test was negative for blood clot.  Yeah!!  I would have done the same as you did in that situation.  I remember my mother in law who had a radical mastectomy and all her lymph nodes removed in 1976 and she was told to never have any blood work done on that arm etc but that was a long time ago.  Just think back then the only treatment for breast cancer was radical mastectomy.  We have moved forward for sure and still a long ways to go but progress.  
Barbara

Hi I recently had bi lateral mastectomies and axillary clearance both sides. I raised this with my surgeon and she said their is no evidence that vaccinations or taking blood increases the risk of lymphodema and to use whatever arm I wanted. The same goes for blood pressure readings however I don't think other parts of the hospital are aware of this!