Looks like I lost my mucus plug?! 18 weeks pregnant?!?

For the past 6 weeks, I have been having a weird discharge. Approximately once a week, or maybe a little less, I have a big glob of jelly like substance in my underwear. Sorry if that is too much information, but I just thought it was normal for pregnant women. Now that I researched what a mucus plug looks like, it very much looks like that! There is no blood or color in it, it is clear. But it is just a big glob of goo. Should I be concerned about this, or is this normal? I had BV (Bacterial Vaginosis) when I was 10 weeks pregnant, but I had no signs and took medication to get rid of it. Please help!