Oo naman, pwede ka pa rin magpa-lab at OGTT even at 33 weeks, marami sa amin nag-delay din ng tests for various reasons, and the important thing is you get it done before delivery! Mas okay na ngayon than hindi na talaga, kaya I'd say contact your OB agad para ma-schedule mo, especially the OGTT since it's really important to check for gestational diabetes at this point pa lang. Your doctor will know if there's anything else you need based on kung ano pa talaga ang missing, pero don't worry, it's not too late, momsh!