Low lying placenta/orgasm

I was told at 20 week scan I have a low lying placenta (1.9cm away) they want it 2.0+. I'm 26 weeks now and I go back in 2 weeks to see if it has moved. 
Question: will orgasm without penetration affect it? 
I have had probably 3...sleep and from stimulation..I am concerned but all my doctor told me was NO SEX. She never said anything about stimulation or lifting things.