Hi
As you told your wife is O-ve and you are A +he then most important injection is Anti D injection which is scheduled by Gynaecologist around 28weeks of pregnancy.
Tetanus injection is also administered to protect mother and baby from tetanus.
Next Steps
Precautions to be taken in next four months
1. Take care of kick counts, it should not be very less
2. Avoid long travels , if want to then consult Gynaecologist
3. Take care of any swelling in hands, face , backache, cramps
4. Do mild exercises
5. Remain active