Essential oils and fertility

Anne
Hi ladies, so I have tried just about everything to get my bfp and nothing yet. I feel a little salty but I really want to be able to conceive. I have a 7 year old son, was 20 when I was pregnant with him. My fiancé has a six year old son. Call me selfish but I hate that he was able to conceive his child with his ex in only two months. (She no longer sees her child as she signed off rights) but either way we have tried for six months and nothing. I've used preseed, evening primrose oil and I take prentals. We have sex everyday (mostly) and I take opks. Just wondering if anyone has tried essential oils to help conception. We are trying everything before heading to the doctor. Any info back would be greatly appreciated. 
Thank you