Definitely worth getting checked out. I had these from around 29/30 weeks onwards (on and off, not constant), bp normal at midwife checks at 28 and 34 weeks, but sky-high at 35+5 when I was admitted with pre-eclampsia. I did have a couple of other symptoms though (swollen ankles and two migraines (really hellish ones, but separated by several weeks)).
Don't panic. Just get checked and if all normal, just keep an eye on things - as long as you're aware of the symptoms of pre-eclampsia, you'll be fine. I pretty much shrugged it all off and shouldn't have xx