Need some reassurance

According to the app I’m 5w&4d and I found out a week ago. The only symptoms I’ve had it exhaustion, very light cramping and weird tastes in my mouth. Well this morning I woke up and I had a small brown spot in my panties. I tried not to worry cause I know its common in the first trimester. Well I just went to pee again and this is what I find. I’m fearing the worst but I would really appreciate some reassurance that things could be alright. My first appointment is tomorrow but I feel like it’s forever away.