After sex

Louisa
Heads up, this is going to sounds rather stupid 
Four years ago, I encountered an eptopic pregnancy, where my right folopian tube was removed 
Now after sex, I ensure I lye on my left, is that stupid and just in my head? 
Also, I always try to avoid going to the toilet after sex, cuz I feel it could all just come back out.... Is that just in head? An is it best to go pee after sex? (A friend of mine is pregnant again, an she always pees after sex) 
Btw my husband and I have been ttc for 2years now and nothing ....