Hey i started out taking Wellbutrin 150 SR once a day didnt do an...

Hey i started out taking Wellbutrin 150 SR once a day didnt do anything for me so it was uped to 300 XL once a day in the am i noticed sleeplessness, irrabilty, frequent trips to the bathroom, extream memory loss. I work at Tops i cannot remeber if i have asked my customers how they are today this happens within maybe 5 seconds. i cannot remeber what my car looks like, what time i have to be to work, if i have already taken my meds. Has anyone else experienced this? Please let me know.