Missionary position is painful. Belly down enjoyable.

Ladies, getting fucked in missionary position have been getting more and more painful as I have gotten older. I don't know if its because i am not creating enough natural lubricate or it is something else. I used to be able to take almost dry (my exes' preferred it), but it is almost unbearable and unenjoyable these days. IDK if my previous years of taking it dry or rough damaged anything =(. I found being in the belly down position is soo much better now. It feels much bettter lubricated. I wish I could have a good lube but i tried almost 10 different ones and they give a sensation I don't like it. I am an all natural kind of girl btw - i don't like condoms or using lube.

Does any other ladies relate?