Period or what😡

Carly
This is just not my day the picture on top is a picture what my dates looked like before I came on my period again after my fertile window and picture in the circle is when i put my period on it all changed yesterday I hate light blood today it's red not sure is normal or not or is it signs of pregnancy not sure if you can have spotting that quick when it told me it was my time to try to
Conceive and best times I have sex them 3 days am all confused I have back pain and that's all not period pains o normally have could anyone please help meÂ