can these two be used together?

No please don’t. Alternate nights. Recipe for serious skin irritation and barrier compromise

Big No. Very irritating. Separate routine, nights only

No, it will cause irritation, use on alternate days. Plus the toner (seeing that your skin is sensitive) don't use it everyday it will dry out/irritate your skin. Plus adapalene is way more drying then retinol. I would suggest getting a hydrating toner 🙂

No!! What you can do is use them in alternate nights, to avoid irritation/sensibility!

No! Maybe it cause you irritation, use it in different days to avoid it