Sudden discovery of Varicose veins

Did anyone develop or is experiencing varicose during their pregnancy? And what did you about them? This is my 2nd pregnancy, and I have been feeling a mild soreness in the back of my thigh for a few weeks, especially when I sat down or stood up. But I assumed it was muscle aches. I continued going on walks and light exercises and going to work, which is mainly a job desk bound. I try to get up and walk every one hour to alleviate the soreness.. Then, a few days back, I suddenly felt lumpiness at the back on thigh and checked the mirror. To my horror, I saw a large patch of BULGING thick purple veins. Now, whenever I stand up, I feel a slight throbbing sensation, and I feel very conscious of them. I'm also worried about how long they will remain there. My next check-up is in 2 weeks, so I will definitely consult the gynae then. In the meantime, do you have any advice for me?