Hi and welcome to HCM.
Dear sir. The impact of these situation you re mentioning is negligible. There is no need to follow some non.scientific methods for better fertilization. The most important thing is to ejaculate into vagina. After this milions of sperms travel through the cervix
. Position dosnet affect it and this is absurdity. Just be relaxed,dont hury and i am sure that everythinf will be fine. If you dont have baby one year after regular sexualt intercourses, then you should seek specialist help.WIsh you good health.