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 these I 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.