3 months of oral supplements, iron has gone DOWN. Pregnant.

3 months ago my iron test showed a ferritin level of 20 and hb of 125. I was advised to take x2 maltofer, every 2nd day with orange juice on an empty stomach. I have been doing just that for 3 months. Got another blood test and ferritin is now 17 and hb is 115.

I asked about an iron infusion since I'm pregnant and worried if I lose blood during birth, I won't recover and it will impact my milk supply. I'm speaking to an OB later this week and hope they will do an infusion for me.

Is there anything else I can try oral/supplementation wise? I'm desperate to get my levels up.