Yes. I went to a therapist and later a child psychiatrist as a child while in a diagnostic process, and later while in college I was made to go to a therapist for (approximately) eight weeks after an ER visit and a (one-visit) referral to an outpatient clinic at a local mental health hospital. Personally, I have never found it particularly helpful but my experience seems to be an uncommon one as most people seem to find a great benefit to going and having somebody to talk to about what's bothering them so I'd unquestionably recommend it.
As you feel your problems are affecting you enough to consider speaking to one, you're absolutely not wasting anybody's time and if your problems are affecting you as you describe then you're absolutely right to speak to a professional about them. In the first visit, you'll likely be asked what has you in to speak with the therapist, and some general questions to gauge your personality, As a professional, the therapist will be aware that it's not easy to approach somebody about (what can be) very personal problems, and will help you to feel comfortable and open up about them. If you're in difficulty it sometimes is not easy to take the first step and seek help, but you've already done this and you've taken an important step in confronting the problems you feel are affecting you.