Thought on my situation?!

I found out last Sunday I’m pregnant. I’m only 5 weeks, this is my second pregnancy. With my first i didn’t bloat or show until I was 12 weeks pregnant. I’m freaking out because at 5 weeks I barely fit in my fat pants which were purchased post my first baby! Is this normal for a second pregnancy? Could it be twins? 😳 could I be further along even though I had full blown period prior to this one? My first prenatal is not until May 5th I know I’ll get answers then but I’d like to hear your thoughts on this maybe for a peace of mind. Thanks!