Going to a HbA1C of 125 is quite the difference... I don't know how long you've been battling infection and/or stress, but those can make numbers go up.... But since a HbA1c is an average of 3 months, weighing more heavily on the most recent weeks, it's... It's high. (And the conversion to 13.6 made little sense, so thanks for adding the 125 in later in the thread!).
You could get a CGM while adjusting your diet for the time being. Dunno if you can go for long walks -well aware they're not an option for everyone- but if you could fit one in here and there, that'd be good too. Not just to lower blood glucose after a meal, but it should reduce stress a little as well.
I don't know if this is a temporary thing due to the infection and recent stresses, or whether your diabetes has just plain gotten worse, but in either scenario, information is helpful, and a CGM would provide you with it. Take note of your meals, drinks and meds, match them with numbers that spike or dip.... If it's a temporary thing you could just go very low carb for a while until things normalise some. If it's a long-term thing, it's time to adjust your diet for the duration, if you're up for that.
https://josekalsbeek.blogspot.com/2019/11/the-nutritional-thingy.html should help some.
In any case, here's a vote for a CGM. And you might want to check whether your thyroid hormone needs adjusting, the need for it doesn't always stay the same. (I used to be on 175micrograms, now on 100, and being off-kilter there can affect blood glucose.).
Good luck!
Jo