Should I worry?

This is my 3rd pregnancy and before I had my second I had a miscarriage and I’m 7w today n earlier wen I wiped I had the tiniest bit of light light brown discharge n Idn if I should start worrying. My initial intake appointment isent until July 13th I’ll be 11w by then but my mind is making me think the worst now ever since seeing that n I have had cramps front n back since finding out n I also found out late around 5w6d n was smoking n drinking prior so I’m a mess rn 🤦🏻‍♀️🤦🏻‍♀️🤦🏻‍♀️