Severe constipation - help!

I'm 8 weeks pregnant tomorrow and I haven't gone #2 in about a week! I don't know what to do! Normally I go every 1-2 days. It's starting to become painful. I was in the hospital for 3 days for a severe kidney infection, and they gave me a laxative, but it never helped! I'm afraid of what's to come. Any advice? Thank you!