I’m sorry to hear of your experiences. The best person to ask these questions to is your current acupuncturist who is most familiar with your case overall. But I will give some general opinions which may be helpful.
If it is encouraging at all, I do a fair amount of fertility cases and I’ve successfully treated many women with “recurrent” miscarriages. One woman had 6 miscarriages (in a row) and everything worked out well after a few months of treatment.
For most fertility patients getting pregnant is half the battle - at least you know it is possible which can be a better position than many are in (regardless of age). And you seem to get pregnant fairly quickly which is also a good sign.
Recurrent miscarriage is a fairly well explored phenomena in Chinese Medicine and there are herbal and acupuncture treatments that can be used if it looks like someone is going to miscarry. These treatments can be tough, however, as many times there are no or minimal signs and even if they are there your acupuncturist has to be able to get you in very quickly as there is a very small window for those types of treatments to be effective. But there are treatments, besides the fostering and ultimately preventative work that your practitioner is already doing.
When you say “resort to western medicine” - I’m not entirely sure what you mean. For the most part western medicine has options for increasing the odds of pregnancy but not very much that can avoid miscarriages. Certainly genetic testing of fetal tissue is possible to rule out any genetic issues that may be contributing. Most physicians, however, will not run those tests until you have had 3 or more miscarriages (technically “recurrent” at that point). Other western bloodwork may be helpful (hormone panels, etc.) for you to have in case you do other options in the future, but very likely useful as well for your acupuncturist to possibly better direct the treatments.
Miscarriage is somewhat common, rates vary depending on time frames but around 20% is applicable here. Two in a row is somewhat less common, but there are a host of factors (besides age) that can be contributing. Your first early miscarriage counts, of course, but things can happen early that just make the fetus not viable - and many of these have nothing to do with anything except nature so to speak. It is still a miscarriage technically, but a bit different in clinical meaning than your second. My only point here, is that this doesn’t yet exactly show a trend, even though it would be easy to see that as the person experiencing it.
I would recommend you get some relevant bloodwork from your western doctor and keep seeing your acupuncturist (assuming they have a good amount of experience with fertility) and just see how things turn out. It can very frustrating, but in my clinical experience with proper treatment there is a 90% or higher chance that things will work out well.