Morning that does feel like alot for you to deal with im not surprised you had a melt down!! Don’t be hard on yourself. I’m not in the same position as you but I’m 2 weeks post surgery with double mastectomy and sentinel node removal and I’m waiting to see my surgeon on Monday for results of pathology. I dont know what to expect but my DCIS was 35mm on scan but who knows what they found in surgery. I think if they tell me I need radio or chemo I will be totally freaked out tbh.
My scar is pretty swollen in areas just in the middle where both sides meet and under each arm its squishy like yours and my BCN said thats fine it will go down.
I’m doing my exercises and yesterday I did the ones where you slide your arm up the wall and on the right side where I had the nodes removed its pretty sore this morning which I think is understandable cause its first time ive done that one, you’ve just got to take it slowly and don’t push it until it hurts its just gentle movements to keep your arms going.
I hope that helps a bit message me if you need a chat I here just recovering like you 
