I think we can all understand the desire to keep our precious child safe from all harm. But in reality it's just not possible, and I agree with many posters above, in the long run you're likely to cause more issues with the level of over-protectiveness.
Maybe you could run through his concerns to try to put his mind at ease?
It doesn't really matter if children do get D&V - sure, it's not that nice, but it's only illness, they get better. Same with colds and things, really not the end of the world. PLus, it's not like germs are lurking constantly - my 2yo DS is determindly unhygenic, always licking trolleys, touching the loo, feeding birds and eating chunks of the bread at the same time, picking up anything gross/interesting and yet he's never (yet) had d or v - although I am sure he will at some point.
Again, learning to open drawers and doors safely is important. DS has trapped his fingers a couple of times and they cry but then they stop crying and are fine.
Eating minced food will mean that the correct muscles for speech won't develop. He needs chunks. Maybe your DH could learn exactly what to do in the event of choking - I did and it made me feel more comfortable.
Anyway, with the best will in the world, they will injure themselves however careful you are.
14 months is prime age for anxiety in parents I think as you basically have a moving/walking baby who has no fear and no idea of consequences. It does get better as they get a little older.