I have been paying my bills in medical school trading option for a year now, so the only record keeping I do is keep tabs on how much income I generate per month and don't do any record keeping other than this. I suppose I received handsome premium but it was quickly absorbed by my monthly expenses.
I went to Pritzker med.
Ostensibly you've been shorting puts for a while. No way (for us) to know how much you've gained/lost. Your PNL is irrelevant to the trade going forward. No, you shouldn't short synthetic straddles with limited knowledge. Your practical risk would be reduced and you can choose to be long or short delta.
The issue as I see it is that you cannot continue to write puts as you were assigned. So either sell the SPY and continue to short puts, go to cash, or convert the current position into a vol-position. If you don't know how then you should cover the SPY.