34weeks tomoz still very anemic 😣

so I'm 34weeks with my 4th child and all the way thru this pregnancy I have been seriously anemic and it just keeps on dropping.. I have tried strong meds which only tore my insides to bits, I have tired iron rich foods and for the last month I have been taking two spatone a day with orange juice hoping for it to help.. cos if not I will be sent for iron injections before me planned c section in 5weeks time and that sounds pretty scary!.. anyone had any first-hand experience with iron infusions?? side effects?? do they help fast?? ECT