I regret my abortion so much 😭

I had an abortion 4 weeks ago. It was a scared and impulsive decision. I already have 3 kids and I am still with my kids father. He also has 3 other kids. Together we have 6. He did not want me to have the abortion but something was telling me I needed to. I was regretting it before I even put the first pill in my mouth. I just found out my sister is pregnant and I lost it...we would be pregnant at the same time...I just totally regret my decision. I learned a lesson and I never want to do that again. Is it awful of me to want to get pregnant right away? I feel like whatever reasons I was scared about before no longer matter to me and I just need to fill this void. I am tired of crying everyday. Every time I see a pregnant lady or babies on my newsfeed on facebook I just get so depressed.