There's quite a lot going on with your nodes. I don't want to get too complex too fast, but just to throw out some key astrological phrases:
If I'm looking for a past life experience of violence in your node story, it's easy to find. South node in the eighth can indicate that. South node ruler in warrior Aries: those indicators together suggest an experience of war, or something similar--if not a literal war, then maybe living in a gang ridden neighborhood, or experiencing domestic violence, or something like that. The third house placement of the sun (SN ruler), plus its conjunction to Mercury, indicate a "must think on your feet" kind of situation.
And, your south node is tightly opposed by Venus and loosely by Mars. That could indicate who or what was an insurmountable obstacle to you, in a past life. Mars opposition suggests victim of violence, but this is a very wide orb opposition, so it doesn't look like it was as extreme as it might have been. But, you have a very tight Pluto square to the nodes, and that's an even stronger suggestion of having been victimized--maybe directly and personally, like being the victim of an assault, rape, or lynching, or maybe in an indirect, impersonal way, like being in the path of a bombing.
Because of that very tight opposition from Venus and square from Pluto--and because your Venus and Pluto so tightly square each other--I expect you've got some running life theme of interpersonal conflicts, maybe a feeling of being repeatedly backstabbed. If I have to guess at who the backstabbers are, I would say most likely female (Venus) and probably your peers or friend group (Pluto square from the eleventh house). Or, maybe unrequited love is a running theme for you--another possibility with Venus opposite south node. Maybe financial insecurity is, or body image issues--that would reflect the oppositions being from the second house. Some people with tight Pluto/Venus aspects have repeated experiences of sexual violence, or significant power plays, or both.
Without knowing if any of this is true for you, I don't want to go further. If what I've suggested doesn't sound like your life, there's probably something else that matches these themes in some way.