Without knowing all the details of your situation, I think you can call yourself a flawed feminist, as are most of us. It’s not an optimal feminist existence but we dont live in a perfect world.
It’s a bit like when people say environmentalists are hypocritical because they drive cars.
We live in a patriarchal society and most women find they have to accommodate men in some ways, whether as partners or spouses, employers or friends. As you are not responsible for the behaviour of men and as it’s quite difficult to live a life totally without men, you are bound to live with the fallout of their actions. That doesn’t automatically negate the fact that you have feminist principles.
You stay you accepted the child he conceived into your home. Does that mean you are now this child’s guardian? Or just that you accept the child in your home? Either way neither of these seems inconsistent with being a feminist: the child is not responsible for what this man did and your actions are charitable.
The only way I can see in which your behaviour could be construed as anti-feminist is that if you have female children you are signalling to them that indefinitely is something women should tolerate and that’s not a great message to send them.
But I wouldn’t judge you for this as I don’t know the circumstances.
Are you still with this man and do you want to be?
The only observation I would make is that it’s not great for your self esteem to remain with someone who has disrespected you in this way. But you probably don’t need me to tell you this.