Major constipation!

Im 6 weeks and 2days pregnant. I've been having an extremely hard time having a bowel movement lately. It got so bad that last night I woke to extreme pain and cramping. I sat on the toilet for 30mins, while in extreme pain I managed to move a really hard solid one then followed by clear liquid. Then more cramps. My husband took me to the emergency room and I was given a muscle relaxer and something else for nausea. They did an ultrasound and baby is doing great. My question is, has anyone else ever experienced this, and what did you do or eat to battle this issue. This is my 2nd pregnancy but my son is 15 and I don't remember having any of these issues before (probably because I was 19 when I had him). I'll be 35 in 2 weeks and this time around is so different! I feel everything and it's making me a mental emotional wreck! Can anyone relate?