Insulin requirements have more than doubled in the past few months?

So as some of you may have seen over my last few posts, I've been really struggling with high blood sugars.

Things got so routine, I was doing so well. 6.5 A1C, I thought I knew it all. So I stopped testing. I'd eat the same foods, use the same insulin doses. Over the past month I started to get really thirsty again. Started to lose weight. So I started testing again very occasionally, and my bgl has been above 20 almost every day. I've doubled my basal, and doubled my regular bolus doses. I'm still running really high, and it seems like even 15g carbs will spike my blood sugar super high.

I don't know what's going on and I'm getting really scared.