Pregnant again!?!?!

I had an abortion Sept 19 2017 and I think I might be pregnant again. Is it safe for me to get another abortion this soon? We used condoms. I’m supposed to get on BC on Nov 21st. My period is due nov 17. I feel like I have the same symptoms as I did when I was pregnant. I guess I’ll find out in a week. I just can’t believe this is happening again!