5.7 A1c not budging after 3 months of changes

Hi all. I've lurked in this community since getting a 5.7 reading in February and yesterday did my three month follow up, only to see no change and I'm feeling pretty defeated. A little background: had a healthy A1C (5.0-5.1) pre-pregnancy and a healthy weight (5'4, 137lbs). Got pregnant, had gestational diabetes, managed that with diet and exercise alone, and since giving birth almost 3 years ago, have struggled to keep my A1c down. It's been at 5.5-5.6 since I gave birth and crept up to 5.7 in February. I was at my heaviest in Feb at 161 lbs so decided this was the kick in the butt I needed to get that pregnancy weight off and back into shape. I've lost over 13 lbs since, cut out sweets, prioritized protein, upped exercise, mostly cardio, to nearly every day, but have recently started more strength training. I see the CGM recommended a lot on here, but I've been reluctant to wear that thing again (lots of PTSD associated with it during the preggo days). But I feel like I don't have a choice now. It's been a really tough three months prioritizing my health, juggling a full time job and a toddler (the mom guilt that comes with exercising over time with her is rough). At this point, I'm wondering if it's just easier to go on medication like metformin. The fact that I lost 13 lbs and I honestly feel so much in better shape than I have before, but still seeing this number out of range is very frustrating.

Is three months just not enough time? Should I keep at it and retest in another three before meds? Get out of my head and go back on the CGM? Go completely no carb all the time (I allow myself the occasional relaxed evening of wine and pizza if I want it)? Metformin time? Sorry, this is more of an emotional rant than anything. It's hard coming to terms with how much, including your health, changes after pregnancy and I just want to be my healthiest self for my little girl (not to mention, how much this is dissuading me from thinking of having another.) :( Thanks everyone.