Starting to get nervous

Yesterday at my appointment I measured at 35 weeks instead of 36. The doctor wasn't concerned as it was only a week difference. Does this mean I'll go over due? I am desperately wanting him to come on time or maybe a couple days later. But not an entire week or two. I know they hit growth spurts and can catch up at anytime. I obviously won't try to induce early but what are some things I can try to do to ripen my cervix and help get things going naturally? I would want to try doing this at least after 38 weeks. Any advice you can give me? My husband and I have been trying to have sex often so his semen can soften my cervix but I want to prepare my body a little more if possible.