WHY?!

I CANNOT get her to sleeo through the night anymore. She literally ends up in my bed 5 nights a week. Which means my husband gets kicked out of bed (he's a heavy sleeper and I don't trust him not to roll) and it means I'm not sleeping because she's kicking me all night. What in the hell is going on?! She's been sleep trained since about 6 months and puts herself down like a champ. Our routine is the same every night. She just got in 5 new teeth so I thought that was it but the last one of that round broke through 2 weeks ago. She acts totally normal all day, nothing abnormal but at night she's all awry! I'm going crazy here! Any suggestions?!