7weeks pregnant and hard to poop.. normal?

Normal: Constipation is extremely common in the first trimester. High levels of Progesterone slow the bowel down and lead to constipation. Also water intake is usually decreased due to nausea and not feeling well. Increase water intake and add a stool softener like colace (docusate sodium). You can also use laxatives like Dulcolax or sennekot if needed.