Confused and concerned. Need advise!

My husband and I have been TTC for about 4 years now. A few weeks ago I had spotting. It was not like a regular period. It was bright red and not enough for pads/tampons as I'm a very heavy bleeder for 7 days. This bleed only lasted 5 days And was almost only when I wiped. I get waves of nausea, tender breasts and so tired I can't keep my eyes opened. I took 3 pregnancy test ( 2 first responded 10 & 11 dpo morning urine & 1 Wal-Mart cheap test 9 dpo morning urine) all was positive. I recently took another because I am now 15 days late and it came back negitive and I took another one this morning that was also negitive. I need advice. Out of the whole 4 years ttc this has never happened. Should I not be excited and get my hopes up? Your input would be very much appreciated.

Thanks!

Sorry the pictures are not so good. I tried to make them the best I could... Again sorry!