Third trimester back pain and nausea 😭😭

Sooo I have had the worst sleep ever as per usual but this was worse than ever went to bed super early coz I felt nauseous haven’t felt nauseous since the end of my first trimester and I’m now 27 +4 woke up a bunch of times everytime I woke I felt sick it’s 2am I go the toilet and throw up everything and couldn’t stop for quite awhile go back to bed wake up and my back pain is worse than it has ever been has anyone’s nausea come back to them in the 3rd trimester and what do you girls do for back pain? I’m not big so people wonder why I’m in so much pain and tbh I do too I workout almost every day to try and help with the pain but nothing is helping I just feel like I have been hit by a train today 😭😭