Possible gestational diabetes. Advice welcome

[Nevergiveup21]

I am wondering if you kind people can please help? Currently 35+2 and since last Saturday have been using a blood sugar monitor from the hospital at home. Back story is, the baby has always from the beginning been measuring big. This is an ivf pregnancy and I have been on sertraline for horrendous anxiety since 16 weeks and under the care of the perinatal mental health team which has worked wonders. I have been having private regular scans with a fetal medicine doctor all along just to manage this anxiety. Everything great with scans, baby just always been following his own wee growth chart and like i say measuring big. Then at 34 week scan baby tummy has really grown quickly and his weight estimated 7.2lb at 34 weeks so my fetal medicine consultant at hospital emailed my consultant requesting another gtt. My fundal height also measured 40 weeks at 34. The hospital agreed to let me monitor my sugars at home. I passed the GTT at 26 weeks with no problems which I had because my dad is type 2 diabetic. Now to the results of my monitoring. Since last Saturday, I have had 3 slightly over the limit fasting readings and 3 under. My highest being 5:6, the other 2 have been 5.3 or 5.4. The other 3 fasting readings were under. My post 1 hour meal readings all under. The diabetes nurse doesn’t think I have it but it doesn’t sit right with me. It doesn’t sound conclusive enough for me. I am not sure what’s going on as I’m not doing anything different each night to get some fasting higher and some fasting readings lower. There must be a reason. My husbands side had babies all over 9.5 or 10 pounds as did my grandmother and aunties so I knew in my heart I would always carry a big baby. Doppler scans and blood flow are all fine, fluids round baby all fine. Waiting on a growth scan with nhs to see what they think as haven’t had one since 31weeks which was requested by midwife for growth and at that he was measuring big but no concerns as just following his line. I am getting scans weekly with fetal medicine doctor too. I have a c section booked for exactly 39 weeks due to his size and my anxiety. So my question is what do I do? Do I persist with the diabetic nurse and hope they give me something like metaformin to help with the fasting levels or do I carry on with what I’m doing. I’m terrified this goes undiagnosed and we have problems with him after birth. I would rather get it under control now. They r very happy with diet from what I have logged. I’m on thyroxine, sertraline and starting fragmin injections too. What would your advice be on how to proceed? Does anyone with experience of gestational diabetes think I have it? I just want to do everything I can to bring a healthy baby home. I know I have just over 3 weeks left until section so it’s not long but just want it be on my notes and birth plan if I do have it so the baby and I can be monitored accordingly. Any ideas how to get fasting levels down? Thank you for letting me off load and any help would be so gratefully received.