Hi sdd,
Welcome back!
I read where you said that last time you were on low-carb, you started getting heart palpitations and that you were on a diuretic medication. Hopefully you have talked to your doctor since then about whether or not you should STAY on the diuretic meds while eating low-carb. Low carb is naturally diuretic so do ask you doctor about lowering or completely eliminating the diuretic medication. That could help you be more successful.
And join one or more forum threads where members post regularly to support one-another. And, consider starting a journal. A lot of folks find that keeping a journal chronicling their daily food intake, weight, and general feelings (especially about anything that is causing stress) is helpful. Do note that other members will pop into your online journal to offer support and suggestions but the folks here are all amazingly kind. You won't get any nasty spamming. We're all fighting the same battles and we pull FOR one-another!
You can also pop into other people's journals and read as much or as little as you like. It's a great way to get to know the real people behind those screen-names.
And, if you have specific questions that you don't feel comfortable asking "in public" on the forum, you can send a private message to any individual member that you think might be able to help you out.
So do stick around and make some friends. You're going to like it here...and you're going to LOVE the new, thinner, healthier YOU that IS going to emerge over the next days, weeks, months, and years! Yes, you REALLY CAN do this! Many of us have done it or are in the midst of doing it and we are here to show you the way and cheer you on.
WELCOME!