I feel alone.

So I’ve been really stressed out about school and stuff. I’m a sophomore and it’s been only three weeks since I started and I’ve been getting loads of work. I’m those type of people that aim for A’s & take my education seriously. If I get assigned work I try and get it done as soon as possible to not feel any weight on me. These weeks I’ve been feeling so stressed, tired, not hungry. I feel sick I feel sad I feel like crying. This is all too much for me and idk what to do to feel better. I have my boyfriend that I’ve been with four years and he supports and helps me a lot too. He makes me feel better and when I get time to relax it helps too. I told my mom today how I’ve been feeling, the same thing I posted right now and all she says is “ if school is so hard then stop going to school”. Like are you serious. I was hoping that she’d be here for me and tell me that everything’s gonna be okay and to atleast help me feel better with all I’m going through. But looks like I can’t even count on her for that. Since she never went to college she doesn’t understand that I actually do want to be someone in life and succeed. So her response to that threw me off. Any advice of what I can do to feel better ?