Hi Flower,
I hv spotting too during my 1st pregnancy. Dr Ho had advised me to have injection (an tai), almost weekly till 12 weeks. I remember I had a week, I hv to do daily but instead of injection, they gave me tablet that insert via vaginal.
My girl is 31 months old. Everything is ok.
You will be fine, just be extra careful. Don't carry heavy thing or move a lot. Rest more.