Try incorporating a less buzzy vibe into your play, like the JimmyJane Little Chroma (sorry to name such an expensive choice, but it's the one that always works for me). I find that using that vibe makes me more sensitive, rather than less, but if you're used to something buzzy, it might take a couple of really long sessions to really appreciate the deceptively mild vibrations. At first, it feels like 'this is it?!' but then it turns into this intense, low stress buildup, with multiple deep, satisfying orgasms.
A majority of women require some clitoral stimulation to get there, so don't beat yourself up if you always need a little something more than penetration, but the Little Chroma combined with a dildo seems to result in a more varied experience for me.