Radiofrequency treatment (for aesthetics) during my fertile period. Can it damage the pregnancy?

Lasers work on the surface level of the skin so there shouldn't be any danger to your fetus. Congratulations on your pregnancy. Best, Dr. Nazarian

In general,Topical radiofrequency and lasers applied to the breasts only treat to a very superficial depth very remote to your fetus.

Most radio frequency treatments for aesthetics have their effect very close to the point of delivery without systemic effect.  You and your baby are very likely just fine. Not ot sure what type of device was used, and we don't know what we don't know, but damage to uterus seems very unlikely. 

The zone of injury or activity of the radiowaves which were in your breast should have no effect at the level of your uterus or ovaries.  This travels through tissue for well less than 1 inch.  Although we wouldn't purposely treat somebody who is pregnant, the thought that you got pregnant around the time of your procedure should be irrelevant.

Rediofrequency treatments are not recommended in pregnant women.  There is no way to know if the treatment on your breasts on the 19th will effect your pregnancy in any way.  You should discuss this with your plastic surgeon.