Future MIL

Ok so

Last year in January I found out my bf and I were pregnant. We were not trying and were using protection but it still happened. He was 25 and I was 24. We had been together for just over a year and living together for most of that time and although a surprise we were ready.

When we told his Mom she lost it. She said I must have planned this because he had a girlfriend before me for 4 years and this never happened. Blamed everything on me. Said it was a huge mistake.

March I had a miscarriage. She never apologized for the things she said. Now when I see her I still feel some anger about the situation.

It's been over a year and it still bothers me. Especially now that we are TTC. Any advice? Should I just let it go?