Just wondering..,

My period last was 14/04/15,we had unprotected sex on 26th and not particularly trying to conceive,too early to test but past 4-5 days ive had loose stools and gone bout 3 times a day which isn't normal and I feel really bloated towards evening time and tired and just wierd? Could it be very early preg signs or just a bug do we think, the sex was a couple of days prior to my fertile stage according to glow? I've 3 other kids and didn't know with them til early my missed period! Belly feels abit like a washing machine when j lean over on it?!