Need advice please!

So in march I had a very long period because my uterus lining was more thick than normal. AF stopped on the 23rd of March and during April I did not get a visit from AF only very very light spotting that only showed up on toilet paper.. I have been getting sick and nauseous every day and I have had minor cramps but nothing like a period. I have had diarrhea, head aches, severe mood swings that are nothing like they normally are(my fiancée thinks I'm going crazy because how moody I am) a metallic taste in my mouth a lot, my boobs feel like they are changing(size) I get really bad lower back pain just from walking or laying wrong, I have been having weird cravings like beef jerky dipped in cookie dough ice cream. I have taken 5 tests in the past 2 weeks and all were negative. I had one amazing woman tweak my test pictures and she said there was defiantly a line but I just needed to see if it would get darker but I took a test 2 nights later (i know fmu) and it still didn't show, I saw a line when I held it to the light but it was still super faint. I'm not sure if I'm pregnant or if it is normal since I bled so much in March and maybe am just getting sick? Any advice?!? (Below are my tweaked pics)​​​