I am currently taking Ativan 1mg. for my anxiety but the dr. also prescribed me Atarax (hydrOXYzin) HCL 25mg for insomnia... I took one of each at 10 a.m. this morning and I took another 1 of each at 10 p.m. my heart beat feels like it's pounding really hard at certain points an I don't feel tired, should I be concerned ?