Question!

I’m 18weeks 4days with my 3rd. My second was born prematurely so I know what it’s like to go into labor early. My question though, I’m pretty positive I’m losing my mucus plug. There’s bloody yellow/white color to it and it’s quite a lot. Enough that I’m wearing a pad bc it’s quite a bit. Now, I wouldn’t be too worried but I’ve started Braxton Hicks (that aren’t too close together) I’m fixing to call the hospital bc my doc obviously isn’t open. Does it sound normal to lose mucus plug at 18 weeks? I’m also starting to swell a ton in my feet and am super tired/dull feeling. It’s super weird to explain but idk. pregnancy is crazy🤦🏼‍♀️