Spotting dalam early pregnancy memang boleh happen on and off, but since you're only a week out from implantation bleeding, I'd say better to check with your doctor just to be sure, especially kalau the spotting is persistent or heavier, sebab they can do a quick scan to confirm everything's progressing properly. One of my mum friends had similar experience and hers turned out fine, but peace of mind lagi penting at this stage, so jangan tunggu-tunggu lah. All the best!