High risk with twins

I'm 23 weeks today with 💙💜 twins on Monday the 17 of September I go for a cervix length like every week its routine. Plus Im already doing progesterone suppositories. But this last Monday they said I had started to funnel and Im doing bedrest at home as much as I can because I have a 2yr old girl Ive already had 14 pregnancy and only 3 living children this is my 15 pregnancy and I'm very scared I want this pregnancy to be successful and I'm going to get my tubes tied. I'm wondering if any one has gone thru this and what suggestions do you girls have?