Great for the tummy, terrible for the bum!

My partner and I have tried a number of formulas, we started on A2 platinum and baby was a nightmare! Scream crying till she turned bright red and her poos were green water with little bits of undigested milk, it was horrendous! Did some research and tried novalac for colic and it's been wonderful! She's been on it now for about 7 weeks and she sleeps well, barely cries, drinks all her bottle, seems to love the taste! Only problem and it's become a big one is that she is very badly constipated due to the formula being so thick. She poos out little rocks and she's had a couple of poos now that have been coated in blood. Have tried extra water, water between feeds and coloxyl drops in her milk but nothing helps so have unfortunately had to change her formula now as she's also showing signs of reflux. Am trying novalac for reflux at the moment but am worried that because it is also a thicker formula it won't help at all with her constipation and I can't have her on thin formula as everyone she's tried (A2 platinum, mamia, novalac for constipation) just makes her scream bloody murder. Have had to get a bottle of actilax and suppositories so fingers crossed!