I had sex 18th=22nd my period came on the 23rd it was only 3days it normally last 5 it was real heavy the first two days then the 3rd lite & went off.I normally cramp extememly bad didn't have much cramps this month and I haven't had a appetite in 2days and I'm having a little pain on the left side of ovaries am I pregnant?

It's possible, but it is more likely your period was a bit off from the sex you had right before it or just because periods can be off a bit now and then.

It would not be common to become pregnant in the few days before a period as you most likely would have already ovulated a little earlier in your cycle.

Since no time is 100% safe from becoming pregnant, see what happens when your next period would be due. If it doesn't show, try a pregnancy test. If you continue to feel that you may be experiencing some other symptoms, try a test earlier.