This episode of dizzy spells, nausea
and bad headaches
can be because of the interaction of the new medication which you have been prescribed for the UTI. Since you are taking many drugs together for multiple of problems, chances of drug interactions increases significantly. Ativan
which you are taking for headache is not the proper drug for headache. Kindly talk to your doctor who prescribed you Trimethoprim/Sulfamethaxazole for UTI to change it to some other medication. Be careful to let him know that you are taking so many medication, so that he/she can prescribe the appropriate antibiotic for your UTI.
Thanks and take care.