Right side lower back pain, and spotting??

💕K
I am 7 weeks and 3 days, Today i just randomly started having back pain but on my right side, down my butt cheek and leg. Since i found out i was pregnant i have had on and off spotting, but i went to wipe ans spotting light brown like old blood again, i gotta cal my docotor monday, but thinking abouy making a ER trip. Anyone have this before and everything turned out okay?