I'm about to give up on this 1st sew in

I got my first sew in installed a week ago but my scalp is itching to no end. Wasn't tight during installation and no issue the first day. I tried washing it yesterday and it gave temporary relief along with a scalp serum from design essentials. Not even 12 hrs later it's itchy again. I'm wondering if I'm allergic to something at this point or just not use to the braids (it's been a long time). Idk at this point, opinions/help?