Why do i feel very pregnant but im not 🤔

A little background... i have a 3 years old child, a blighted ovum in march (tried abortion then dnc) and a chemical pregnancy in july...

But its been 2 months and I'm feeling very very pregnant 🙃

Went to the hospital in october and the ultrasound results showed the following

But i also had uti so the gynecologist was like it explains the nausea and the frequent urge to pee and there is no need for mri because the fibroid is very small as it shouldn't affect me at all..

However, i still feel very pregnant beside taking antibiotics for uti...

I also get my period every month (although its usually regular but its a bit different and irregular the past few months) and i also feel movement in my lower abdomen at night and back started hurting these days...

I keep checking my hcg levels and its always negative

Is this all in my head?? Is it possible that im experiencing a phantom pregnancy without realizing it? My belly is getting bigger everyday from the time i wake up (i had 2 situations where ppl i know asked if im pregnant because they say i looked pregnant).. its very confusing.. shall i get a second opinion? Im afraid i might be having some kind of tumors or something else?

Has anyone been through the same? I feel like its really affecting my mental wellbeing..

*pls no harsh comments because its very confusing and i know i sound crazy but i know my body and i know something is wrong