evening primrose oil

So My doctor checked me when I was 36 weeks and I was 1 cm dilated and wasn't thinned out any. I am now 38 weeks and he checked me yesterday and I'm 2cm dilated and 60% thinned! I've been taking the evening primrose oil pills one orally everyday and one vaginally every other day. As well walking at least a Mile a day and having sex 3-4 times a week. But I feel like it's working because the other day I had BH for 12 hours after having sex. If y'all could take a guess how much longer do y'all think I have ??? He has my induction date set for next Wednesday but I'm trying to naturally induce labor before if I can. I'm a FTM and I know sometimes labors a little bit longer for FTM that's why I'm trying to make as much progress as I can before I go in !