10 minutes apart!

ok so im 35 weeks.(not to mention ive been 1cm since 32 weeks. ) I always walk round the track but a few minutes I just got in i was having sharp pains in my vagina every 10 mins even when i was walking i didnt stop walking. I just stop for like a min or two and continue walking. Im home now. They still hitting every 10 mins. They are not painful just sharp and irritating. What shall i do?? (my 3rd pregnancy but never experience this with my other two)