I'm not going to say that you aren't pregnant but...
A swollen stomach could be caused by water retention (common just before a period) or by a stomach bug.
Green poo - not a top 10 sign of pregnancy - but everyone is different, but could also be sign of stomach bug?
So if you last had sex on 11th july you need to establish if this was just after your period, mid cycle, of just before period due?
If mid cycle then you should either be due or possible late already so I would suggest doing a home pregnancy test.
As for the "special feelings" congrats on finding a wonderful lover who fulfills your needs