need help ladies!!! please!!!!

Tasmin
Literally, I was meant to have my period 6 days ago today, I've thrown up twice since I was meant to have my period and constantly feeling nauseous. I have on and off cramps but they're very mild, the Lower back pain can be really bad!! But it settles down sometimes. I haven't taken a test yet, I wAnt to take it on the 10th missed day and that's on the 27th.
I've been pregnant before and when I was pregnant I couldn't eat, I was put off all meats and it's happening again, the thought of chicken or mince makes me nauseous and the smell is just unbearable
I need help!! Do you ladies think I'm pregnant? Or am I just being crazy
The same thing happened on December though, I didn't get my period and I took about 10 tests all neg, I went to see a doctor 4 times and all tests were neg, really thought I'd get my positive that I want so bad but I didn't. But I ended up missing my December period and then had a Very long period in January it went from the 13th to 23rd Jan. 
I really need help understanding my period!! Am I pregnant or not😭😭😭😭😭😭😭