Girls!!! Help please!!!!

Happy New Years to all of you!! 🏮🎉
I have a huge question. Today something is been happening to me and it happened before. So I don't know. I think it's implantation bleeding. Very light red discharge when I wipe myself. Very little. I'm about 12 days from getting my period. Last month I got my period and I was 4 or 5 days late then I got it. And now today I saw that and lately I been feeling very nauseous and in the morning specially. I vomited 3 or 4 times. Here and there and all of them in the morning. Last time this happened it was the same thing my breast were very sensitive and now they are. And everything just like I'm explaining. I thought I was pregnant but I guess I wasn't because I got my period even though it was 4 days late. I took a test today and it was negative. What do you girls think and when should I take a test. I read implantation bleeding happen between 6-12 days before period. I told my fiancé and he keeps telling me I'm pregnant. We wanna have a baby so bad. We thought I was pregnant last time so I don't know if this is happening because I'm stressing over getting pregnant. But what about all the symptoms and the red discharged. Please help!!