Some one please respond

I’m 18 I found out I was pregnant last week I am now 5 weeks and 3 days I haven’t had any symptom other than slight cramps dizziness and nausea today I used the bathroom and seen brown spotting used it again and seen light red but just a little the first time a drop in the toilet and the second just when I wiped I am scared this is my first pregnancy and I don’t want to lose my baby I don’t know if it is normal or not since I’ve gone this whole time without spotting some one please help this is all new to me I just want a healthy baby and to be a good mom.