Help Plan B?

So me and my husband were doing the deed last night when he pulled out we saw that the condom had ripped. We have never ever had this issue!

He has always said if it happens it happens. Meaning that if a condom breaks and I get pregnant than oh well type of thing. Well last night all that changed. He is wanting me to take plan B . My doctor is saying no because I am still breastfeeding. I don’t want to quit breastfeeding. He is saying now how breastfeeding is dumb to continue past 6 months.

Anyway I don’t want to take plan B. I have once before and it fucked my life up. I bled for a month and a half almost 2 months. How do I approach this situation?

Thanks for all the help :)