Confused-Femara

Ok so this cycle my obgyn put me on femara 2.5mg for cd 3-7. When i went to my vaginal ultrasound last month they couldn't see my left ovary because my intestine was in the way but they said i had follicles on my right ovary none of them were big enough to measure tho. So i started the medication this cycle and today cd 12 i went for another follicle scan. She took two seconds to try and see my left ovary and switched to the right one. My bowel was in the way but she said there was nothing there. No follicles ?? Idk what to do she told me to give up on this cycle because there were no follicles but she never tried to check the left one. My obgyn told me at my last apt that the ovaries can alternate where the follicles are at. Should i give up? I dont feel like she tried hard enough and i feel something in my gut telling me somethings not right. Someone please help me. We have been trying for 4 years and this was my first round of femara.