I can tell you, having had 2 children via IVF, that fertility treatments themselves are very stressful. I can't say how much of it is due to the hormones, but I don't think it matters -- the whole process of constantly monitoring your body's hormones and egg production, giving yourself injections, and all the hope pinned on each cycle is certainly stressful enough. So, first, acknowledge that what you're going through with the fertility treatment alone is stressful and you need to take extra care of yourself during this time. You need to deliberately and prescriptively make time to do that -- whatever works for you. You may have limitations on physical activity if you are stimulating egg production, but there are gentle activities you can do like walking and yoga in that case.
As a therapist, I also think it would be helpful to get a clinician to address your self-diagnosis of generalized anxiety disorder -- to either verify or more accurately diagnose what you actually have, and then to work with you to learn what your symptoms are, how and when they manifest, and what is the best course of action to deal with them. It's possible your anxiety is situational, caused by the infertility issues, and thus medication is really not warranted. But a lot depends on how severe your symptoms are and how related they are to the infertility.
So I really think, if you are seriously considering medication, that your first stop should be to see a therapist. I would ask around your friends or look online for reviews to find one that would be a good match for you. Your fertility specialist might even have one that works with their patients, and may also be offering support groups you can check out as well (I know my office did).
Good luck, I hope everything works out for you.