Only when I'm preggers do I have these symptoms

Secila

For a while now I've been feeling light headed. Not all the time just when I turn my head propensity my eyes too fast. I've been feeling very gassy and even passing gas. Tonight one of my nipples gotbreally tight and then it slowly went back to normal. My gums are bleeding. All of this and I'm in my fertile period. Meaning it I am pregnant I got pregnant late in my last cycle because I had a light period. Saving the tests until I'm late this cycle. Just nervous for more negatives. I'm 40, hubby and I. And we had a miscarriage last summer. We've been trying ever since. Have dust to you all.