Confirming pregnancy



So with my son I went to a kind of sketchy pro life place to have my pregnancy confirmed because I was young and had no insurance. This time I'm not really sure where to go but the ob I go to needs proof of pregnancy confirmation from somewhere else before making an appointment. I'm not too sure where you go to do that I don't go to doctors much (but won't miss an appointment for my son or dog lol). I'm 4 weeks tomorrow with blazing positives on first response and dollar tests but still faint on the clinical guard dip sticks so I'm not even sure if it's too early for the doc. Some advice would be great thank you!!