Okay, so when was the last time you fed her? Did she regurge then? Where is this temperature you are measuring? Is it on the floor of the warm side? Is it made using an under tank heater or lights? If you are using lights, I would strongly recommend you switch over to an undertank heater. However, with that, you also need to get a thermostat to make sure it doesn't get too hot.
THIS one is used by a lot of people (including myself) and works great and is pretty cheap. With the UTH, you want to create a heat gradient where one side of the tank is "warm" (83-86) and the other side is cool (~70). This is measured on the floor. This belly heat is super important for digestion.
Since she has regurged multiple times - you need to be very careful moving forward - regurges are very, very stressful on snakes, so you need to prevent them moving forward. To do that, first you want to make sure your temps are okay, next read
THIS (scroll down to where it says, "Kathy Love FAQ's").
Also, can you possibly weigh your snake for us? That can help us tell you what the right size of food is once she is better. You can use a kitchen scale even (that's what I use)
Best of luck and I hope we can get your little snake on the mend soon.