So sorry you are going thru this added stress & further surgery swisha​ You've been thru a lot already. I was lucky & only needed the original surgery.
It is a difficult decision to make and I do not envy you having to make it. There is a possibility of more disease being discovered in another excision, as the lesions appear to be 'long' instead of 'round' (given the latest lack of clearance.) ... Is your breast 'large enough' to have another bit taken out (without the need for building up again?)
How comfortable are you with the thought of having a mastectomy? When I was first diagnosed, I was happy to go the whole way, if the surgeon deemed it necessary. Luckily, that wasn't the case.
Maybe give our helpline a call for a confidential chat? Just talking it out with someone else might help with your decision making xx 1800 500 258
Take care & all the best