Should I be concerned?

Sh

I am 7 weeks and 1 day, I had an ultrasound last week at 6 weeks and 6 days and I know the baby is pretty small but we can’t see anythinggggg, they told me to drink a lot of water and come back for a follow up this Friday.. My last pregnancy was an ectopic pregnancy, leaving me with one Fallopian tube. God forbid this is a repeat I would be devastated if it happens again. I’m being told to watch for any cramping or bleeding but honestly when it happened last time i didn’t experience bleeding or cramping I just randomly started bleeding and cramping one day and rushed myself to the hospital! Should I wait until Friday before I take myself to the ER?