I'd agree that seeing a doctor about it (especially since there are tingly hands, heavy breathing and head pain involved) is really the only thing to do. Just by way of trying to be reassuring, though....
Although the tingly hands, (maybe) heavy breathing, and pain in the head aren't what I've ever experienced; the rest of it does sound like it COULD be low blood sugar. Low blood sugar isn't so much about how low it is, but how rapidly blood sugar levels drop. Eating a candy bar or something like a couple of cookies gets rid of it fairly quickly.
Something I had once was that I had a drawstring skirt that I wore fairly frequently. A couple of times I had unexpected faintness (and some of the other things you mentioned). It occurred to me that I'd tied the skirt well enough to keep it up, but when I moved a certain way it would make the drawstring tighter and apparently reduce circulation. So, I'd loosen the string and immediately feel better.
As far as I've ever experienced or heard, if you have anxiety you know it. It's not something that has the physical symptoms without your knowing you're anxious "in your head".
Having mentioned a couple of harmless things above, it's important to now add that you could have a serious medical problem that you're just not aware of. Besides whatever other medical possibilities there could be, many of the things you mentioned are among symptoms associated with heart "issues" . This particular set of symptoms (especially since they've taken place more than once) isn't something to guess about. Let a doctor rule out anything serious and reassure you if the symptoms are anxiety (or something similar), but don't guess. I've had "the shakes" from low blood sugar many, many, times; and I've never had the breathing, tingling hands, or pain symptoms you've mentioned. (Maybe others do, but I'm answering from what I know for myself.) I'm not assuming anything (and don't want to scare you), but the breathing heaviness and neck pain (among other things you mentioned) are signs associated with heart problems. They could be caused by other conditions, but heart problems are what are making me say you should see a doctor and have that possibillity ruled out first.