Moving up in dosage put me on my ass.

This week I moved up from 5 mg to 7.5. I took it first thing in the morning while getting ready for work. In was feeling fine at first then, boom, felt light headed and dizzy. I remembered I read to make sure I hydrate so I took some hydration packets. It was on and off for an hour or so. I took a nap to get through it but felt fine for the rest of the day.

Is there any tips anyone can offer me? Hydrate day before? Move down a little in dosage? Move shot to night time? Thank you in advance.