My endometrium lining is 17mm, do i need to undergo d&c procedure? or this is normal?

No! Only consider if: Tumor or uncontrolled bleeding. Thickening is a result of ongoing estrogen stimulation, in preparation for pregnancy, implantation ; blood supply to support placenta. 17 mm is quite thick; a few courses of bc pills can suppress if judged appropriate. Best to seek out and work with someone worthy of your trust. Docs paid for d;c, poorly for better assistance, buyer beware, as always.