Repeating Surah Faatiha in Salaah

I was praying salaah on my own and I was reciting Al-Faatihah and then I felt confident that I missed an ayah, but wasn't sure which one and I knew for sure I had recited up to "Ar-Rahmaa-nir-Raheem." So I hadn't yet completed Al-Faatihah and I went back and recited from "Maaliki Yawmid-deen" until the end. I also in the same salaah was unsure whether I made two or one prostrations and did one more to make sure and after salaah I made two prostrations of forgetfulness for these mistakes and for any other mistakes I made. Then in the two prostrations of forgetfulness, I doubted whether I said the second part of the Durood "Allaahumma baarik 'alaa Muhammad..' (peace be upon him) and so on. But I thought it was a doubt and ignored it, but don't recall doing it now. Is this OK? Anything I have to do?