What was this with my pregnancy? From nonstop to nonexistent?

I'm 4 weeks. For two weeks straight, I've been having nonstop sharp abdominal pains. All the damn time, dawn to dusk.

Just a few days ago, I started to have an itchy groin, fishy odor, burning pee, and copious amounts of yellow discharge for a few days in a row. ( in soaked a pad through my underwear that turned yellow).

Today, after nonstop worrisome symptoms, they all seem to be non existent.

I don't get it. I was soooo worried because of the intensity and duration if what I experienced. At first I was convinced it was ectopic, to PId, to BV, or cysts.

I've been pregnant before and it was nothing like this. Why did I experience this and all of a sudden it just stop?