No BBT spike in chart

I'm 28yo, we've been trying for our first for four months now, and this is the first month I've been tracking my temperature. I'm around CD 25, and still haven't seen the bbt spike, so now I'm beginning to worry that I'm not ovulating at all. Anyone else struggling with this? Talked to a friend about Clomid last night, but not sure how soon I should look into that option. I realize we've only been TTC for a short while, but it does make me wonder if it's not meant to be.