If i have sex with my boyfriend and he ejaculates inside me while he is goin through chemo-therapy...will my body be affected in anyway?

No: Your boyfriend's chemo won't be dangerous to you.

Be careful: There are a couple of issues here. There are some chemotherapies that are excreted in relatively high amounts in secretions (semen) right after receiving chemo. Try to wait a couple of days. Second issue is birth control. If you happened to get pregnant, the fetus could carry mutations because of the chemo affect on his sperm. A condom will help for both of these issues.