Hi RBagster and welcome
I don't know if you have had the opportunity to read posts in this forum regarding something called Antiphospholipid Syndrome. It is also called Hughes Syndrome, or "Sticky blood". What happens in someone that has this disorder is that the body causes clots to occur all over the place. And with those clots, come symptoms of "brain fog", migraines, miscarraige, stroke, TIA (mini stroke), DVT (leg clot), etc It can cause some awful things to happen if left untreated. Some of the Neurological symptoms that you have described here (the miscarraiges, tingling etc) could be caused by that. I also feel that you have the symptoms of Lupus, and the blood work too! APS can go with Lupus hand in hand. Have you had this hole in your heart for a long time? I don't know (based on what you said) that the heart problem is causing your ANA to be positive. Often these doctors will blame anything and everything! Do you get pain in your lower back? It would be such a good idea if you could get into a Rheumy at the same time. The surgery for the hole in your heart can throw you into a flare, so be as cautious as you can! ANd see about getting into a Rheumatologist ASAP.
Oh- and the ANA being negative isn't an issue, many people with Lupus have a negative ANA until they are so sick that they end up in the hospital, then it comes back positive. So basically, you can have the symptoms without the blood work! I really hope that they can figure you out!! I am not sure what kinds of symptoms having a hole in your heart can have, but I am not sure that all of your problems are explained by that. Please take care and ask as many questions as you need to
Talk to you soon!