Freaking out- need you girls!!!

So I took a test (non-digital) last Thursday and Saturday and they were both negative. My books have been very sore and I went to my doctor and they felt a lump so they ordered a mammogram (im only 31!). I had the mammogram and breast ultrasound yesterday and thankfully everything was fine. Did not get my period yesterday or today (it was due pn the 23rd but I am not always on time) so I took a digital test today and I got a positive. So I am freaking out!!!! Do you think this is accurate, they always say to use first morning pee which I did not do. And I just had a mammogram and hVe dramk every night for the past few nights since I wAs convinced this was not the month. Tried googling mammogram and pregnancy and already found too much scary stuff!!!!!!!