Did I really ovulate these days?

Annalise

According to my chart I ovulated the day after my period had finished (my cycles are a bit all over the place) and I’m not sure if it’s possible to ovulate after your period straight away? me and my partner BD the Wednesday and the Friday (29th & 31st).. after this I then again started bleeding on the 7th of February! Literally a week after finishing my last what I thought was my period.. this bleed was different though I’d say medium flow for a little under two days and now just dark spotting.. I have taken several pregnancy tests since ovulating but there all coming up negative.. would it be possible that I did conceive on the days I ovulated but I’m to early on in the DPO for a positive to show?? I’ll attach a photo of my chart :)