What’s going on????

So my period was due 6 days ago today. I got a period which lasted a day with spotting for 3-4 days after. I’ve felt so off and just unwell and tired this past week. I’ve been to the doctors and asked for blood test to check iron levels, and have also just found out I have a uti so have a bit going on at the moment. I took a cheapy pregnancy test yesterday and it was negative.

But this morning I’ve woke with extremely sensitive nipples. Even my jumper is irritating them. Should I bother using a first response of just leave it at the cheapy test being negative? If I was pregnant I would be just under 5 weeks