Symptoms, negative HPT, period, symptoms again?

During June around the 20th-25th I wasn't feeling good. I had started becoming extremely exhausted more than normally, back pains (lower back), headaches, heat flashes, my appetite had changed (eating less) weight gain,heartburn,constipation,TENDER breast, then started feeling light headed. Well I took a HPT & it came out negative. A few days later on the 28th I started my period just like normally & I had it through until the 3rd of July. It was weird for me to have those symptoms because I have NEVER had problems with my periods at all. Well I ovulated on the 8th & 9th. But my boyfriend & I had unprotected sex on the 10th, & he did go me. (he never uses protection). Around the 13th of June my breast started becoming sore again, I happened to notice some little white bumps like pimples around the nipple area, I started hurting in my back again, Became nauseated to foods & certain smells, Weird combinations of food cravings. (Doritos & peanut butter), I started having heartburn, became constipated & when I did go, it was like diarrhea like, having to pee more than normally, (ill empty my bladder and not even consume anything to fill it with) fatigue again, mood swings, very emotional, Well on the 16th of July I woke up cramping lightly in my uterus? then I went to the bathroom and saw the littlest speck of blood on my panties kinda darkish, like brownish. Well that day I did not have no need for anything, Well it continued on until sunday, I started wearing liners, but it would never get dirty enough, but the color lightened up to a pinkish tint. I took a shower tonight & noticed I had blood clotts falling out of me? & i still kinda of cramp? I am soo lost, I don't know if I should stop worrying about a HPT & just go get a blood test done, or not worry about it? Sorry so long, Just I am desperate for some advice.