You should start the Clomid 3 weeks after your last shot of Omna. Start with 300mg/Day for the first day of Clomid use then take 100mg/Day for the next 6 days of that week, the next week take 50mg/Day of Clomid and the final week take 50mg/every other day. I would add some D-Bol in there for the first 4 weeks as a kick start to your cycle but it is not nessasary
M18