Tried Monistat, crying and burning, I’m lost, please help

So I just tried using this, and I’m trying to find quick help. I’ve never worn a tampon before no matter how hard I try I can’t do it. I always end up breaking down and crying from being so scared and frustrated and confused. I just got a yeast infection and I need it healed fast also, and I’m on my period. I tried using it tonight and it’s Even bigger then a tampon! I calmed myself down and tried to use it but I think i did something wrong. I couldn’t get myself to push it in far about so I kind of stopped there and did it. I freaked out and took it and it started burning really badly. By now I’m sobbing and trying to get it to stop. I jumped in the shower real quick and it’s only uncomfortable now, but I didn’t get any inside, and kind of just put it on the outside hoping that would do something. I’m just so lost, and scared, and idk what to do. Please help me