Yes it’s very useful to have a good doctor to give that extra level of reassurance and support if needed 
@SexGod2314 gave some great tips. The hummer is a great wand attachment.
For me not cumming is not a big deal. I can have a lot of fun just making her cum but if she really wants to make me shoot a well lubed stroker with an open end where she sucks the head of my penis or the hummer are pretty much guaranteed to finish me off.
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Sounds like something my boyfriend needs as he only last a couple of minutes! Something that stopped him wanking to porn all the time would also be great 
How did you get on?
As a male - it takes me a long time to climax having traditional vaginal sex. I love being with my wife and it feels so good - but I just don’t get enough stimulation to finish the job. I love it when she cums and that gets me going. I am in good shape but after a few minutes of traditional penetration I think she is sore and I am tired. I don’t mind taking matters into my own hands - but is there anything else that will help as I love cuming inside as does she.
Sorry - we never hurry a good thing. i’ve seen it take 15 minutes of me tonguing and fingering her pussy/clit to get her to orgasm. So? As long as she cums!