When did I conceive, help please!

Hello guys!

So I've been with my partner 9 years, I'm 25 and hes 28 .. we have two sons together (6&1)but recently we broke up (and then got back together a month later)

While we were not together I slept with an ex a few times (unprotected, yes I know.. not a good idea but any who...)

This was on the 14th and 15th July and took a morning after pill on the 17th July.. my period was 10 days late but eventually 'came on' but it was quite light (11th-16thAugust)

Any who.. I stopped seeing my ex and got back with my partner and had sex on the 18th and 25th August. Started to feel odd and got a pregnancy test on the 2nd and got a faint positive! Took a other today and the test line is super dark. Now I know I had a 'period' inbetween the two but still so nervous. Could you guys have a look and see who is more likely to be the dad!? (With 2nd child I had a period just a couple of days before I found out I was pregnant) I know this is very foolish of me and should have been more careful but I dont need any hate or negativity please! Just some help!! Pics below.

Thanks all