Spotting after intimacy

Q: Whenever I have physical relations, then I get blood spotting with discharge for at least one day thereafter, but this is not haiz. Can I perform salah in that condition and without gusl can I involve again in physical relations?

Abortion

Q: I am married and a father of one child. My wife is 4-5 weeks pregnant and we both are not ready for this child because my first child was born one month ago with c section and I currently don't have a job and we are in a lot of problems also. Can we opt for an abortion?

Taking a false oath

Q: I smoked weed once or twice which I am not sure is haraam or not. Anyways recently my mother found it out from my bag. It wasn't mine and she made me swear upon her head and the quran that I haven't ever smoked weed in my life and I did. Please tell me did I do wrong by taking a false oath and what penalty I have to pay for forgiveness? If I hadn't done it, she might be heartbroken.