Advice Needed please 😢

So I got my BFP yesterday (faint line but defo there , I did 3 tests). For the last 3 or 4 days I've been having stomach ache as if AF is on her way but she didn't show yesterday so I did the tests. Today I'm still having pain but also been to bathroom and when I wiped I saw this. Should I be worried or could this be 'normal? Its more brown than the pic shows. Any advice please 🙏🤰❤