No symptoms on letrozole and concerned!

CD11 And have my follicle scab tomorrow after taking letrozole 5mg. This is my first round on letrozole after 3 rounds of clomid. RE switched me due to horrible side effects on clomid despite having success with follicles and ovulation. I’m nervous that it’s not working because I’m not feeling aches like I did with clomid...

Is this common?