Some please help!

Kirstie

Iv been spotting since about 7 weeks pregnant I’m now 12 week 4 days and Iv had this saw my baby on Monday and everything was brilliant ! I’m so scared I’m loosing my baby I’m A negative blood type and they told me I could possibly have some bleeding if baby is postive blood type m hoping it’s that as they can give me injections to keep the baby safe I have no cramping at all just this when I wipe