Audra, I hope this helps. I did DM in my twenties w/o insurance and a low-paying job and I wouldn't recommend it to anyone.
Cobra is a federal law that guarantees that an individual and dependents can continue on with an insurance plan once that individual leaves the job that was the provider of that insurance plan . It guarantees that the plan is available to that ex-employee for like 6 months after leaving the job. The only catch is that the ex-employee has to pay 100% of the premiums, whereas before the employer was probably covering 80-90%.
Most employer plans have options whereby dependents can be covered. (I have never heard of it where it was employee coverage only.) If your fiancee is covered through an employee plan, you probably can be too. Even as his fiancee (you may have to be living together though. I am not sure.)
If you walk into any insurance agency, and say, "I am a type-1 diabetic and I want to be covered.", after they wipe the tears from their laughing eyes they may offer you a plan with premiums that are ridiculously high. The one time I tried this way , in 2001, I had to pay $750 a month. Insurance cos. are out for profit. More than likely they would make you pay that much for 6 months without their paying for a dime; your so-called 6 month precondition waiting period. What they are trying to do is build up a big nest egg before you start tapping it with your supplies. Many insurance cos. don't even want to bother.
If it is just insurance that you are concerned about, then my advice is: Stick with Mom and Dad as long as you can. Have their insurance pay for the $6000 pump. Have their insurance cover cost of pump supplies. Have their insurance cover you as long as possible while you sort out your future.
My advice about the wedding day is to enjoy it. Poke your finger a few times and respond appropriately. Don't worry so much about tight control.
Life as a Diabetic who is married? Well, you'll have to do a little of that on your own. Your fiancee is taking on a lot more than you probably realize. Sure, you can say to him always, "Well, I have to live with this disease!" in anger or frustration, but trust me. He does too. Your struggles and pains are his as well, and in many cases, they are amplified. I don't remember when the firemen had to hold me down to insert the IV, or that I stopped breathing, or that I seized, or that my son went an hid behind the couch and rocked back and forth scared out his mind that I was dying/dead. It takes just one time of his feeling this, holding your hand in the hospital, for him to get a scar like that. Love him, and be patient with his frustrations. they are real.