Clomid TTC #2

Hi all, 
So after approx 1 year of TTC #2 still no luck. I have PCOS conceived #1 naturally by accident pill and all 5 years ago so I went to see the doctor and he has recommended Colmid. I was advised there could be severe side effects etc I just want to know if anyone has tried it and what were the outcomes 😀 thanks in advance