Amoxicillin and allergic reaction

18 yr old female here...This is my 5th day taking Amoxicillin, it was my first time taking it, didn't get a allergic reaction yet, this medication makes me feel nauseous all day, i can barely eat a whole plate of food, i only eat 1/3rd of it, i feel weak, depressed, unsteady, a little itchy, and i got gassy this morning and farted a lot lol, i had mild diarrhea, i think i might've gotten a yeast infection, and i just feel gloomy and quiet, i feel distant and i have to force myself to get out of bed and do anything, eating is the worst part i force myself to do, i also became sensitive to bright light and noise, and it made me feel unsteady like if i was going to pass out, i am using this medicine to treat my ear infection because i get vertigo from it. I have Menieres Disease...

My Husband has taken this all his life of course like many of us have as a child and teen. He is now 27 and started this on Tuesday for a sinus/upper resp. infection. Evening of day 1 with first dose and day 2 nothing. Day 3 he started itching and didn't know why. Day 4 lips, hands were swollen. Tongue slightly swollen. Hives started on shoulders and inside of thighs that night. Day 5 swelling down after starting benadryl but hives all over body or rash all day off and on. Day 6 back to the doctor who said that he had an allergic reaction and was now allergic to Penicillin.
Strange but it is true that you can be allergic even after taking it for so many years beforehand.

I was prescribed a 10-day regimine of 500 mg capsules, 3 times/day for sinusitis. Day 1 with all 3 capsules, there were no side effects at all. After the 1st dose on day 2, I noticed that I felt hot and weak. I looked under my shirt and my skin looked sunburned. I checked further and found my whole body from neck to toe was bright reddish, like sunburn. I immediately discontinued thinking I must be having an allergic reaction. The next morning, the "sunburn" changed to thousands of little red dots all over. I called my doctor who confirmed I am now allergic to Amoxicillin, even though I used it in the past for probably 10 times with no side effects at all.