Hi Doctor, My Wife Had Surgical Delivery About 7 Weeks

Hi Doctor, my wife had surgical delivery about 7 weeks ago and our doctor has injected her a depo-provera injection within 3 months and we have remain one last dose. But now i had a sex without any protection and i ejaculated into her vargina so now i am worried for unwanted pregancy. Can wanted 72 i pills helps me here ? Because i am worried about the side effects if we will go with i pill.