longterm antibiotics bad for you?

I'm 18 and have always had acne, but in over the past 6 months it's dramatically worsened. I have a lot of cystic acne, white heads, etc. I started going to a dermatologist, but rarely see him. My skin is incredibly oily and shiny. He put me on Adoxa, but the holistic chiropractor I was seeing, along with my mother, were concerned that it would be bad for me to be on antibiotics long term. also, both my gynocologist and chiropractor have told me i have yeast in my system. my gyno gave me a pill for it, so i took it but didnt think it worked, and bought a kit at CVS. but i still feel like i have unusual discharge that is kind of thick and cloudy white looking, sometimes yellow. and smells kind of too salty and sometimes even fishy. ever since i went off adoxa my acne has gotten worse; it had eliminated all my cystic acne for awhile and i had even started recieving compliments, but i felt like it was bad for me.. and now i'm a mess and my skin is more greasy feeling than ever- my chest and back are broken out too, almost in a rash-like form. i have had chronic constipation for awhile now and sometimes even see blood in my stool, but that all started before the adoxa. also, i've been very gassy lately, and take lactaid pills lately which help a little bit, but i think i might be lactose intolerant. i've had no sex drive lately. i went through a terrible ungoing breakup with my boyfriend of a year and it significantly lowered my self esteem and has made me incredibly insecure, when i used to be a lot more confident. now i find myself feeling very nervous in conversation, and have a tendency to clear my throat and swallow nervously a lot, sometimes losing my voice when talking to people. i'm also frightened and startled incredibly easily, walk with my head down, am embarassed to talk to people and think they'll notice my bad skin, have become very skiddish and solitary when i used to be very social and outgoing. i had breakdowns for awhile and found myself crying a lot alone and sleeping all the time. now i have very little energy. i try to take omega 3 vitamins, B vitamins.. and then zinc and grapefruit extract for my skin, but dont always remember. when i do, it seems to help a little. also, i dont drink enough water and i never excercise, i'm wondering if these things may help my skin and improve my mood. lately i've also been very compulsive and obsessive about everything. does anyone have ANY reccomendations for homeopathic remedies? maybe sulphur or natrum mur? those are two things i read about.. PLEASE let me know. thanks