Embarring and pregnancy question....

Like many women in pregnancy I have found that I have an increased drive and I also achieve s a lot more frequently. Even before I was pregnant my hubby and I would use different toys to spice up our life. One in particular is a large vibrator. It isn't one that is inserted into the , it is just placed on the oris for stimulation. It is quite powerful when turned up to full capacity! lol So, my question is, is that safe to use while pregnant? I've read some answers on here regarding regular vibrators but this one isn't actually inserted into me and it can be a lot more powerful. I'd say you could probably successfully use it to mage your back if you wanted to! I've used it since the beginning of my pregnancy (currently 15 weeks) and I've never experienced any pain during or after use. Also, I have an at home fetal doppler and I always check on the baby afterwards and there is always a very strong heartbeat and sometimes he/she will be moving around and sometimes he/she won't. So what do you all think? Can I continue using it or should I stop it all together? Any info would be appreciated. Thanks!