Vaginal pain/glucose tolerance test question

My first trimester I was on very strict bed rest. I had a Subchorionic hemorrhage. I had sharp vagina pain over and over again and I started bleeding.

Now I am 15 weeks pregnant thankfully. (I’m very grateful to God)

This is my second pregnancy after a miscarriage.

I sometimes feel pressure and vaginal pain. And recently experienced sharp vaginal pain again enough where I felt like I couldn’t move for a second. Is this lightning crotch pain? Isn’t too early for this?

I have an glucose tolerance test coming up. It’s early in the morning. They told me to not eat for 2 hours prior. Considering it’s the morning time and I’m usually too sleepy to eat that early, is it okay to show up fasting or will it mess up the results?

Please let me know. Thank you for reading and answering my questions!