Postpartum periods extremely heavy

Firefox

Holy cow, are they supposed to be THIS HEAVY? I’ve had about 5 since my little guy was born 13 months ago and they’ve all been extremely heavy. Like, soaking through a super tampon, and the backup super pad in an hour and a half, heavy. I can’t go anywhere because I bleed through everything and all over the car’s seat if I can’t get to a bathroom for an hour. Is this normal? I have my yearly well check with the clinic that delivered my baby but it’s not for another month and I’m trying to decide if I can wait that long to get some advise on this