Keeping rooted in the present in the face of past realities

I have remembered at least 4 past incarnations, two being particularly influential throughout my current life before the memory of them. I had been cleaning my psyche and spirit during this time, but I still had a hard time keeping rooted in the present with all these different realities suddenly apparent. I thought I was ready, as I had been studying reincarnation and the possible implications for years before the memories started. Once they came, it was unlike anything I expected. They were visceral, real, encompassing and completely immersive. I could see so many parallels through them all, and deeply rooted throughout my current incarnation. It began to be too much, and I found it becoming hard to keep rooted in the present. I started to wonder if I really was just living the same mistakes again that I saw reflected in the most vivid life, and became scared I would suffer the same pain no matter what I did to stop it. I desperately wanted to seek advice, but had no one near me at the time that I felt would know any answers. So, even though it is years past now, I have found this forum, so I ask those who may know from experience: - How do you keep rooted in the now when all your pasts are constantly running through your mind, sometimes as clear as this moment? - How do you keep this present clear, and not let the other faces and experiences overlay everything?