I had been well-ish before I got pregnant. just the usual problems but no flair up. the first 12 weeks were awful as the fatigue I got was horrendous, I could hardly move and was sleeping excessively.
I have fibro, am overweight and got a surprise bfp while trying to get healthy. I also have degenerative disc disease, a slipped disc, and chronic sciatica. Well, I immediately stopped the vicodin, amitriptyline, clonazepam, and three others I took daily. The first 12 weeks were also hell for me, I hurts all the time and the fatigue for me was also terrible. I, however, couldn't sleep which only added to how bad it was.
At 14 weeks I started being able to get up and do things for short periods of time, the pain lessened a little, and I was able to sleep a little more, but not much.
Now, I can go out for longer, about an hour or two. I have sleepless nights, but get a good 6 hours starting around 4-5am. My pain levels vary throughout the day. At night it's the worst, such as right now my wrists and fingers hurt and my shoulders and back hurt. My legs cramp up bad during the night too. Headaches and neckaches started too.
I assume it will only get worse for me. However, I too have read it is a 50/50 chance for people with fibro to have either a painful pregnancy or a less painful pregnancy due to hormones. I just got unlucky, probably due to my poor health prior to pregnancy. My experience may not be yours and to be honest it is all worth it when you feel the baby moving inside you. It is pretty amazing. I know that all the pain, fatigue, soreness, and sleepless nights will be worth it when I hold my baby boy in my arms.