Monistat vs terazol applicator prescription

Hey guys what would you suggest? I’m 35 weeks pregnant and have been told I had vulva varicose veins. I was assured I couldn’t use anything. Then today I get a call saying I have a yeast infection/vaginal thrush so I’m so confused. I’m glad I didn’t listen to the nurse practitioner and used the monistat only when I felt itching. So they prescribe me terazol. Should I stick to using over the counter monistat or paying $40 for terazol? Are these the same or different? Please help. If I need to spend $40 I will do it without a problem but wanted to know if using monistat would do the same thing. Your thoughts?