Yes you understood correctly. I tried to be succinct in describing the probabilities I would assign to any of the possible combinations and each separately, given what you described. BPD is very likely, I think. Quite possibly BP as well. Just BPD with unipolar depression I find unlikely, but it could be. Impulsivity and the extent you lose control (could someone stop you, without getting physical: strong persuasion) might be decisive in determining which combination.

Your anxiety may be caused by psychotic symptoms. Would be interesting, because your efforts to relieve yourself of anxiety can quickly become far more fruitful/productive with the right treatment.

It's not the online tests that are the problem. That is valuable information. However, it is not enough to describe only symptoms using an N-point scale.

History, described using things like energy/sleep, activity and self-control, failure, missed chances and the causes of feelings of guilt, is pivotal.

Chances are, if you have had multiple periods of mania of different severity, you'll miss at least half or all of them.

Chronic problems are also relevant: bad memory, distractibility due to associations between thoughts/ideas with varying intensity, but always at least somewhat present.

Let someone else also describe some of these behaviours. Psychiatrists sometimes (wrongly) assume that if you have insight, even if only afterwards, you can't have been psychotic. Psychiatrists are crazy, without insight, ever: ask any non-psychiatric medical professional. It's just that they are between us and some of the pills that can be very useful and sometimes really necessary.

OCD could be, but many anxiety disorders kinda overlap: it doesn't always really matter much which you are diagnosed with.

Edit:
But to further answer your question: it could be just BDP with normal/subsyndromal obsessions that everyone might have, but the reason behind them may be BPD-specific.