Thanks for your query.
Most of the causes of recurrent abortions have been ruled out in your case.
i can still think of the following investigations which should be done further -
1. Chromosomal analysis of the products of conception.
of the couple
3. Oral glucose
4. Structural anomalies of the uterus and cervix to be ruled out.
5. Complete semen analysis
to rule out semen abnormalities
6. Thrombotic disorders testing - Protein C, Protein S, factor v leiden
Yes, the injections and bedrest would help you.