Crazy weird question TMI

Ashley • Recently married and wanting kids. My husband is 12yrs older than me and has a son from a previous marriage. Wanting to start our own little family!
My husband and I are TTC. I have a very tight vagina and sex always starts out painful. After he ejaculates and I stand up it seems like it all comes right out of me. I'm afraid none of his swimmers will get to my eggs and we will never conceive. Does this happen to anyone else? Is there something I can do to stop this from happening?