4 weeks pregnant light bleeding - help!

Zoe 🇬🇧 • Mummy to two girls 🥰🥰. 👼🏼 March 18 👼🏼 June 18 👼🏼 sept 18 👼🏼Oct 18 👶🏼 👶🏼lost twins due to pprom at 16+4 6th feb 19 💛❣️

So I found out I was pregnant 4 days ago. Af was due yesterday , today I’ve woke to some brownish bleeding. I’ve done another test to see if the line is progressing and it’s definitely getting darker. Hoping and praying this baby will stick. We’ve already miscarried twice this year 😢