Worried like hell, SO CONFUSED!

I noticed my belly started to bloat a little on the bottom, not the top. I was in very good shape and I was pretty toned. I had the v cut and everything. I then started to urinate more often and now its becoming every 10 to 15 minutes I have to go. Ive been feeling nauseous in the morning and itll go away until evenings hit. Ive been waiting for my period and it NEVER FAILS, I get horrible cramps and my back starts to hurt to the point where it would make me cry, but it didnt happen. I would break out with acne, but everyone is saying that I look more tan and like im glowing, but I workout in the house. I rarely go outside! So the cramps, aches, and acne never came but I finally get what I think is my period but it is off. There is A LOT of blood clots and thats all thats coming out. The blood comes from them. Nothing will be on my pad until the clots come out. Im not cramping, which ALWAYS happens. My back is not hurting, which again ALWAYS happens. When I bloat, my whole stonach bloats. But this time, the only thing that is bloating is my lower abdomen and when I try to suck in my tummy, there is a pocket there that wont go in. I have to suck in extra hard to get it in, but then again it still shows. Im also constipated and when I get my period, I'm NEVER constipated, I get diarrhea.

I know my body and all of these are completely off.

Do you think I could be pregnant?

Is this implantation bleeding?

Is this just my cycle?

Can you still get your period if you're pregnant?

I made a list of all my symptoms before doing some research and it all points to me being pregnant. I will go to the doctor but I would just like to see if anyone else had this?

Need advice please