chances and should i wait for regular decision

I’m a senior and I just got my sat scores today and I’m not happy about it. I got a 1530/2400 , 1080/1600.
My highest score was 1550/2400 so there wasn’t any improvement. I was expecting something higher but I guess I didn’t do that well. My unweighted GPA is about 3.8 but I’m not ranked because I transferred from an online school to a brick and mortar school. I don’t have any ec. I feel my acceptance rate is low because of my SAT so should I retake the SAT in December and apply Early decision. Also I took APUSH in my junior year. Currently I’m taking AP Calc and APCS. I’m applying to Umass Amherst for Computer Engineering. So what are my chances and should I wait for regular decision.