could this help or is it in my head??

Me and my husband have been trying to conceive to 8 months now with no luck. Normally im on top. I know position dont really matter but I have also heard that doing postion that are deeper with penatration can help the spream get where it need to go. So I have heard that deeper penatration can help you try convince like (missionary,missionary with your legs ups,doggy style etc. So this month we have been trying deeper penatration position can this really make the difference with helping the spream and make a difference in ttc