Your chances are actually high, But you might not find out until way later. But if you don't want to get pregnant, you might want to at least stop letting him *** inside of you. At the least. I don't personally like birth control, but My husband and I have used vcf foam, spermicidal inserts, and occasionally Plan B. Which i really would'nt recommend since the plan b I used last time put me in the preggo position I'm in now. But the other two seemed to work fine for about 3 1/2 years. so try waiting to see if you're pregnant first then take this comment into consideration. Hope this helps.
If Your Cycle is a 28 day cycle usually and Your last period was April 29th it has only been 17 days and it is unusal that You would experience pregnancy symptoms so early especially when Your period is not even due yet.
It is possible although I doubt that the chance would be that high.