Check out this topic by TwilightSparklez, she saved me when I was having the same worries: https://www.ddlgforu...tle-in-college/
For me, the most stress relieving tool I used was a planner. Once I got my syllabi for each semester, I would put down due dates and target dates for progress. For example, if I had an essay due at the end of the semester, I would write in due dates for a rough draft, writing center review, and final edits. That way, I wasn't faced with a snowballing amount of work.
It was also helpful for me to schedule time for self care in my planner. It can feel like the only thing you are allowed to do is study, but that has detrimental effects on your stress level. The Resources area has some great self-care tips. You can also search for lists on the internet "self-care ideas".
Another helpful tool is to use all of the available campus resources - even if you think you don't need them. Academic advisors, counselors, career centers - they all have useful information. It may seem like you don't need their services, but it relieved my fears that there was something I was supposed to be doing that I wasn't aware of.
Check out these topics for more stress relief ideas: