Uy, sis, any bleeding during pregnancy, kahit kaunti lang, kailangan mo talaga ipakita sa OB mo ASAP, lalo na kung 4 days na siya. Hindi ko dapat sabihin kung normal o hindi, kasi yan ang doctor lang ang makakasabi talaga, and it's better to be safe, especially at 17 weeks.
Please don't wait pa, call your doctor ngayon na or go to the clinic, okay? A few of us moms nag-experience din ng bleeding pero nakita agad ng doctor, and that's what helped ease the worry. Sending you hugs, and laban lang!