Are there any home remedies that can help ensure i will not get pregnant other than your average contraceptives?

No: No. I can't stress that enough. If you don't want to get pregnant, use some form of birth control. Condoms + spermicides are your best over the counter option. If you are already doing that, adding withdrawal before ejaculation (pull out before he shoots!) helps too. But, condoms are a must.

Pregnancy: I don't know of any home remedies that have the efficacy of products like spermicides, IUD's Condom, oral contraceptives, ETC.