Progesterone and clomid

My hubby and I have been tcc #2 for over a year now and have been on progesterone for 8 months and I start my first round of clomid on Sunday! I'm super nervous because I don't really know what to expect. It's hard too Cuz my hubby is very supportive but he doesn't understand why I get so upset when I start my period each month. :/ he just keeps telling me, it will happen when it's supposed to happen and everything happens for a reason, but that really doesn't make me feel better!! But, what has been people's experience while on progesterone and clomid? what should u expect being on clomid for the first time??