Zoloft: should I?

Lex
Recently I went to my doctor and he is aware that I've been battling some pretty bad anxiety for years now. When I was 14 he wanted me to start seeing a therapist but our insurance wasn't covered by anyone so I never did it. Now I'm 18 and he still recommends counseling but also thinks taking Zoloft would help me. I am against medications like these because I believe they can often do more harm than good. He told me that when you start taking it since your body is adjusting you may have more anxiety in the beginning and that he'd give me a sedative to help with that. That seems like a lot right? The less bad side effects are nausea, dizziness, upset stomach... sometimes bearable but still sucky. Another more serious side effect is losing interest in sex. I have been in a relationship for well over a year and the thought of something like this makes me sad. I don't want to seem like a different person to my partner or anyone I love. I don't want the side effects to make me feel more off than better. I also know that if you make the decision to start this medication it's not something you can just easily stop taking. My doctor thinks that the benefit I would get from it is greater than the side effects because he does see that I'm suffering. 
I'm all about trying to help myself and live healthy but it just hasn't been helping me all that much. And he doesn't think that'll help me so much either. I am definitely chemically imbalanced and do need something to get me to feel and see things rationally and really just enjoy life again but I do not know if Zoloft is really the answer. If anyone could give me some advice please be totally honest. Thank you so much.