I just started my first day of PCT last night with 300mgs of Clomid and 20mgs of Nolvadex and 100mcgs of Clen. While doing squats today I got the worst headache I've ever had. It felt like my brain was going to explode. Could it be the clomid or is there something else that causes theseI had to cut my workout short and come home. It's been about 12 hours later and it still starts to throb if I walk up the stairs.