Clear liquid

I’m a little embarrassed to be asking this because I’ve never heard of it happening to anyone before. This has happened to me twice now. I will put a tampon in during my period and it will be totally fine. Then after a while I start to feel really wet down there and I think that I must have leaked. I go to the bathroom and my underwear is soaking wet with a clear, non sticky, liquid that has a strong smell. I have no idea what it is and I can’t control it. The first time it happened it completely soaked through my jeans, this last time I was home and caught it before it got bad and so I changed my tampon and put on a pad because I was afraid of it happening again. Does anyone know what this is or why it’s happening? Is it something I should see a doctor about?