TMI! Warning! Please help!

This discharge started a little bit ago and is come and go over the past weeks but now it’s super bad. It’s thick and tissue like, it’s almost looks like toilet paper type substance and it’s generally white sometimes has a colour and I feel like it’s starting to have a smell, thought it was a yeast infection but really not sure as I’m young and 23+4 weeeks pregnant. Also, do I need to go to the doctor or is there something I can get from the store ? Thank you so much in advance.