Ttc help

Hi just wanted bit of help really. We have just started ttc my period started on the 4th June and lasted 3 days. I had a bad headache and felt nauseous on Friday and now have a dull ache in my pelvic area feels bit like when I am due on but obviously this shouldn't be the case as it hasn't been long since the last one. Hard to know if you are just symptom spotting or my body is telling me something, feel like it would be too early to have ovulated but not sure. I have two teenage children so have been through this before but a long time ago and can't really remember the symptoms I had and when and tbh wasn't really trying as hard as I am now. Any advise anyone??