Constipated!

I’ve been so constipated this entire pregnancy (18.5 weeks) and I stopped taking zofran probably about a week ago and it hasn’t let up! I’ve also been drinking TONS of water like as much as physically possible. Trying to eat a variety of things as well that include fiber and nutrients. I usually take Miralax every other day, just a little bit, because it makes my stomach hurt a lot. Well I took some last night and was having so much stomach pain I thought i was having Braxton Hicks and have been absolutely miserable. AND no relief (TMI AHEAD) other than literally gloving and lubing and getting it out myself. I’m miserable and looking for ANY tips!