Iron pills make me sick anything else I can do?

I’m in my third trimester and I’m anemic wiTh a level 7 so it’s very low during pregnancy and I can’t take these iron pills anymore. I poop like 4 times a day and I get these stomach aches that last the whole day on and off they’re very painful sometimes I can’t even eat 😢 I’m scared my low iron might affect the baby. Is there anything else I can do to raise my iron levels? Anyone else had a level 7 and baby turned out fine?