Help me ladies

Crystal
Hi I've been trying to conceive for over a year now. I just started really clocking my cycle days. Normally I have 33/34 days in my cycle. This cycle I only had 17. I'm feeling defeated. Why is this happening to me, what happens when you don't have more than 20 days in your cycle. Bc I ovulated on cycle day 15. Then came on my period threw or two days after ??