Sudden onset of cold symptoms, ovulation or just bad timing?

[Hazybaby84]

Can someone please tell me if they have experienced the same. Let me start from the beginning. Me and my partner decided to look into ttc number two at the end of the year, as unfortunately I had a ectopic at the end of may. Well me and my partner done the deed Sunday morning and our only form of bc, the condom split. I am due to O today according to the calendar based on my 25 day regular as clock work cycle. Now to my above question, I was perfectly fine till 4pm approx today, now my nose is really congested and I have a sore throat. It seems to have come from nowhere but it seems a bit odd that I would suddenly get it on the day my calander says I should O. So now I am wondering if it is do with that or if it has just been bad timing and I just have a really bad cold coming on. X x