Issues with constipation

Anyone else having or had issues with constipation? I am 5wks 3days and haven't had a bowel movement in  almost 5 days and I have gained 5lbs. I have tried stool softers, prune juice, hot caffeinated tea with lemon and honey. I stopped taking the tuns and have cut way back on dairy and am eating a lot of fiber throughout the day. Also, my prenatals do not have iron. I go for. 2+ mile walk every evening. Starting to get miserable ....