Its the copypasta used by r/ClotSurvivors encouraging people with symptoms to get checked out by medical profesionals.
We don't know either. There's no secret trick that doctors hate to find clots - the answer is always: "Go get checked out by medical professionals", never "Oh that's clearly not a clot, based on X, Y and Z". It doesn't matter how you attempt to word or rationalize it ("Just looking for experiences, not medical advice" or any permutation of it): We don't know how to figure out what ails someone else, regardless of how well they describe it, or how many pictures they wish to post.
No, comparing symptoms will not yield clinically useful results. Still, it will update any anxiety you already have with new symptoms to mimic (Congrats! You've updated to the new and improved anxiety v1.9!).
One person's clotting symptom is another person's anxiety symptom, a third person's sprain, a fourth person's random pain, a fifth person's muscle cramp, a sixth persons [...]. All present with the same symptoms, and all have different causes. The only way to figure out what's wrong with you is to get professionals to check it out - speculating on the internet will not move your goal any further along. If you feel like you weren't thoroughly checked, get checked again. If that keeps happening over and over, then you can start concluding the cause of that.
You're asking a group of people who have reason to find each other (just like any other support group for a condition), whether you might be on the way to becoming one of us - we'll always err on the side of caution (so you should probably get checked out, sooner the better). We don't and can't know if your symptoms stem from a clot, anxiety, or something else (least to most likely). We're also not footing the bill (time, money, consequences) of going or not going to get checked out.
Likewise, we aren't in the business of relieving anxiety for folks with no diagnosed clots - we're the outliers, and our stories will make you worse, not better. We'll still be here if it does turn out to be a clot.