Thin uterine lining advice

Katie • Stay at home mommy as of 6/30/16!!!
I went on clomid last week days 3-7 it lightened my period and stopped on day 7. Monday day 9 of cycle my period came back super heavy and crampy. I talked to my dr and she said that's not common. Ugh I'm scared now bc I feel like this is going to screw my cycle up. It stopped today but now I'm scared bc at my follicles check appt I found out I have 3 follicles on my left one brewing on my right. But stupid clomid thinned my lining and I think it was 2mm 😳 my dr didn't seem concerned to much and said we'll still go along with <a href="https://glowing.com/glow-fertility-program">iui</a> trigger shot if all looks well fri and <a href="https://glowing.com/glow-fertility-program">iui</a> Sunday. I'm just scared. I'll know more at my next appt fri 
Advice please!!!!!!!