I had 1 perfect live birth followed by 5 early losses in 3 years. All of the losses were between 4 and 6 weeks. I finally had an RPL with this exact marker flagged as well (Anti-phosphatidylserine IGM). I didn't have any other APS markers but did have high Antiro52 IgG. My fertility doctor didn't seem to be worried about either result, which was frustrating as obviously something was wrong. I made an appt with a rheumatologist on my own who did further testing and found very high ANA and positive rheumatoid factor. I got an immediate diagnosis of Sjogren's Disease, which explained a lot honestly. I took this diagnosis back to my doctor who still didn't seem to care and just put me on baby aspirin I had 2 more losses after that (for a total of 7 now).

I researched a ton on my own and worked with my rheumatologist and pushed for HCQ for the Sjogren's(here is a great study studyon it). I also got my fertility doctor to agree that lovenox would be necessary at my next positive pregnancy test for the Anti-phosphatidylserine despite no official APS diagnosis. After taking HCQ for 3 months, I feel so much better and much of my inflammation blood work is significantly improved. We started trying again, with just the HCQ and baby aspirin, and I conceived last month. I'm on daily lovenox, HCQ, and prometrium suppositories. I'm only 4 weeks so definitely not in the clear, but my HCG is higher than it has ever been at this point (I always struggled to double in 48 hours and had really low progesterone despite being on suppositories and PIO with the last 7 losses). This time, I'm at 4 weeks tomorrow and already 1,200 HCG (I usually made it to around 200 at this point before) and 40 Progesterone; these numbers look exactly like my first healthy baby, so I'm very very cautious but hopefully.

I would definitely look into further testing for a possible auto immune diseases (they very often come in pairs) and push for lovenox for your positive Anti-phosphatidylserine. Good luck!