I was diagnosed last year with stage 3B tumor (4 cm), HER2 positive. I found the tumor quite accidentally, taking a shower one day without my bath sponge. I, too, have missed my mammogram due to covid-19 for 2 years. I had surgery (mastectomy) and 21 lymph nodes removed (9 were positive), done chemotherapy weekly (22 weeks), immunotherapy for 1 year (haven't finished yet) and radiation (25 sessions). I've been doing mammogram and ultrasounds in abdoment, chest and breasts every 3 months (because of stage 3B and because HER2 + is a bit aggressive and it is inclined to metastasis in the abdoment). As you can understand I found it just before it metastasized! That's why I did all these treatments without complaining, in fact they made me feel safer, all of them. Of course I had many side effects but the stronger the treatment the safer I felt. Now I am feeling very optimistic and stronger and very very lucky. All of my exams are cancer free now!!! My moto through this was: Hey cancer you picked the wrong broad! I stopped thinking about the missed mammograms (I did at first and it crushed me) because I can't change the past and really I think it's an opportunity to decide what things are important in life and prioritize them, prioritize you for a change! 😊✌