Hey, I know I’m late to this party, I’m rarely on here and usually here just for tech rather than general, and I definitely don’t mean any offense, but:
If you’re taking 18 or 20 units of Lantus in 1 injection without any supplental bolus for meals, your sugar is going to be SCREWED.
Lantus is supposed to be a background basal, it’s not meant to be a primary catch-all. This screams disaster to me, especially if you’re new to all of this.
I take Lantus - I have for years - and I’ve done both large nighttime injections, large morning injections, split injections, and damn near every permutation therein. For me, the sweet spot is taking 9 units right before I go to sleep. I started at 16 units. I had lows all the time at night. It was horrible.
I honestly think your basal is just WAY too high. If you were just diagnosed, you’re probably still honeymooning (your body is still making some irregular small amounts of insulin), and with your constant lows, it’s pretty obvious you’re way overdosing on Lantus.
The suggestion of XDrip+ is spot on. Dexcom’s app is, as @docslotnick would put it, a tricycle with training wheels for diabetes management. XDrip+ is a 12-speed. Snooze alerts, share them to your fiance’s phone, have his follow set to go off after 20 or 30 minutes of lows - everybody’s happy. My wife and I have it set up this way, and it works great… if I’m too dumb/low to get myself up, she doesn’t get constantly pestered; instead she only gets pestered when it matters. XDrip+ also gives you a few options for calculating HBA1C values, so cool bonus for you there!
Lantus/Humalog is my routine, hopefully you’re finding yours, T1 sucks, and it’ll be hard, but it honestly gets a LOT better. You found a great community to be a part of, and there’s lots of great technology that makes it a lot easier, and sorry if I sound so serious, but really: don’t less around with those extreme overnight lows. If you know something’s wrong, don’t wait for your endocrinologist to fix it for you… especially not if they’re the one who suggested it in the first place.
-M