Very worried

So I am like 4 weeks pregnant I just found out I've been with my boyfriend about a year and since I've been with him I have noticed that my discharge has started to smell I know gross but it's been worrying me this whole year and I haven't done anything about it because I'm so embarrassed to go get checked I already have another child and I can remember when I was turning into my teenage years I've always had this greenish light yellow light white discharge coming out all the time I've gotten tested several times specially when I was pregnant with my first child everything came back negative so I've been having those kind of discharge for many years now but they never smelled and since I started with my boyfriend they started smelling really bad I feel like when I'm out people can smell it that's how bad it is I'm extremely worried I might have an STD but I don't know because I've been having this discharge for many years I've gotten tested and everything is fine I made an appointment tomorrow to get tested I am extremely scared any help any advice has this happened to anybody it doesn't itch or burn it just smells that's all and now that I'm pregnant again it's even more noticeable