Night 1 of terconazole

I'm 12 weeks 2 days now. I decided to take the terconazole as my vagina is always discharging. I didn't put the applicator all the way in but about 1/3 of the way in. I'm really scared now that it's going to cause miscarriage or defects. :( I got a fetal Doppler will check in morning. All I can do now is hope it doesn't affect my pregnancy. 2 more nights.