To Benefiber or not?

LaTeaffia
Hi ladies I am 24 weeks with twins and my constipation is so bad 😳😳😳. I hope that's not TMI but it's true. I have not been about to have a good BM in months and it's start to make me so sick. Do you ladies know if it's safe to take Benefiber or not? I have tried everything and nothing seems to work. PLEASE HELP