Low lying placenta, oral sex?

I’m 23 weeks today, at my 20 week ultrasound they said that my placenta was 1.7cm away from my cervix which is considered “low lying”. I haven’t had any bleeding or any issues at all, but I don’t go back until March for a check up to see if it’s moved. The doctor said no penetration, but didn’t say anything about oral or masturbation. When I called back to verify the front desk nurse just said nothing to go in the vagina, but I’m still a bit worried, yet these hormones are crazy after not having an orgasm for a month.

Anyone been in a similar situation? I know with full placenta previa you cannot do anything, but since mine is 1.7 away it should be fine for oral right?