Maybe or not?!!!!

OK I was supposed to get my period on the 24th of this month I never received it!!!... I had a little of light spotting in the middle of the month for three days and it stopped!!! I've had mild cramping in my lower pelvis already and my stomach was hurting me for two days straight...but I've been feeling really tired I've been getting migraines left and right and feeling nauseous once in a while... I took a pregnancy test on the 26th but I feel that was too early because it was negative!!! Plus I've gain a lot of weight and I eat a lot food... I have three kids and I know every pregnancy is different could I be pregnant if my symptoms are different???...I feel this way!!!!???.... And here it's the end of the month going onto the new one and no signs of a menstrual period at all!!! 😕