There is a good chance it is not yours noting that they have their period once a month. According to you she had these symptoms recently 6 weeks after the fact. Logic should show that she should have noticed after 4 weeks max. Also abortion is pointless, why kill the kid if you can offer it to someone who can and wants to raise it. There are a lot of couples that can not even have kids and they can only have a family via adoption. Life is a precious and valuable gift why kill it off when you can give it away to people who want/need it.