Scared...first time with clomid coming up

Hi...first time posting on this app...I’m 36 and my husband and I would very much like to start a family. We have been trying for 1 year. We got pregnant last July, but suffered a missed miscarriage in September. I have since had 4 of avg 25 day cycles and 4+ opk Lh surges, no pregnancy. My OB wants to try three cycles of clomid days 5-9 with sex only morning after lh surge and as much after that before moving on to IUI, etc. I’m scared...I feel dumb for it but I do. I was crying yesterday because I again got a negative test and I guess I was just hoping not to have to need clomid or something else. Just scared....that’s all. I appreciate this group and this app. Sending good vibes to all.