Starting IVF tomorrow

Well after my hysteroscopy, polyp removal and then a month of estrogen and 10 days of Progesterone, my period finally came yesterday on cycle day 377 😳. Worst period ever! But I called my doctor to start my ivf cycle and I go in tomorrow for day 3 bloodwork. I’m assuming I will get started on birth control pills and get my schedule tomorrow. Can anyone give me any insight into what will happen tomorrow or what I can look forward too? I’m so excited and can’t wait until tomorrow morning!