first round of clomid

Hi everyone, I'm really hoping to get some advice here. I've been TTC for 4 months recently married. I am 36 going on 37 in January. I finally got my dr. To agree on giving me a prescription of clomid. I took my first round of clomid just as the Dr. Told me to now My AF is due on the 14th of this month fingers crossed it doesn't and I can finally say we made a baby. 😊 what I'm trying to figure out is... Could I be prego even thou I'm feeling like my period is coming soon. All the symptoms of AF not sure clomid did its job. If I do get my period this month then I will be starting on 100mg of clomid after only starting on 50mg plus metformin 500mg. I'm really hoping clomid works for me. There is nothing more that I want then to have a baby with my husband. Plus I'm really starting to freak out about my age. I also what to mention that I've gotten pregnant in the past so I know I am able to conceive. Please any kinda responses would really help I'm really starting to stress myself out.