Question for those who’ve taken letrozole/femera

Happy Monday(blah-work). I hope all you ladies are doing well! Anyone who took letrozole or femera- what if any side effects did you have? I’m on cd7 and my temp this morning was very low. Lower than I’ve ever seen it. My eye is also starting to twitch, which is an issue I had on clomid. I did start eating grapefruit today. I heard that’s good before ovulation.