My follicle is 17mm on day 15 but i didnt ovulate my cycle is 28 and regular can i use choriomon(hcg) 1000 iu on day 17 for ovulation ?

Wait longer: Here in the U.S. we typically wait until the follicle reaches 18mm or higher before we trigger ovulation. If they repeat the sonogram in 1-2 days the follicle will likely have reached that goal. I also recommend 5000iu at a minimum to trigger. Why not use the full 10000iu to trigger? It's not like you can save the leftover medication for a future month. It won't last that long even kept cool.