Dr gave me clomid, then said I need to wait 3 months to get more?

So I went to the Gyno in June, she wanted to check my progesterone to see if I had ovulated.. (my husband and I had been trying for 7 months at the time). My levels were borderline so they couldn’t say for sure... so she had me try a cycle of clomid. So I had my progesterone check and they said I ovulated on clomid but that they wouldn’t prescribe me any more until I’ve been trying for a year (October). So I’m just really confused why they’d have me take it for one cycle and then once realizing it worked.. not let me do any more cycles until it’s been a year. Like what is the point of this besides jerking my feelings around?!?!