I had it really really bad with DS2 from 16 weeks. I couldn't walk at all at times, had to sleep on the couch a few nights and get my 7 year old to lock up
I have it again this time but so far bar a few bad bouts its not as bad.
As pp said chiropractor was a god send. I had to go to her every week for a few weeks then once a month for the end. I got instant relief and the pain only came back when I undid it myself.
Then and now if I hoover or mop or sweep or push the trolly around or drive to long it flares up again esp if I over do it. If I am already in pain and do any of these things I end up in agony and cannot walk at all.
They said to keep you legs together as much you can (bit late for that now!!!! LOL!!) such as getting in and out of the car and bed.
I'm 20 weeks now and it has eased off, dunno if its cause I know what to and what not to do this time around or if its just not as bad.
Do refered me to physio and they were terrible (my ones were anyway). Just told me what was wrong with me and gave me an exercise sheet to do which I couldn't cause I was in agony and told me to get a belt (which did not help me I was too far gone in pain).
So in a nut shell, keep you legs together, don't over do anything like hoovering, pushing or walking or driving & don't let it flare up too bad cause then nothing helps only days and days of rest.
Good luck