Third trimester "morning sickness" or bug?

So, I have had an increase in Braxton Hicks contractions in the last week. Last night, I decided I needed to lay down because I was feeling uncomfortable and they weren't letting up. An hour later, I start throwing up. I haven't gotten sick one time in my whole pregnancy before last night. Today, I am still nauseous. Does this sound like a bug, or can "morning sickness" come in the third trimester? Thanks in advance!