just looking for advice idk

My period is 16 days late. I went to a clinic when I was 4 days late and took a pee test and it was negative. I’ve also taken at home tests up until about 12 days late, all negative so I stopped. But I’m starting to feel,..off. That’s the only way I can explain it. And in the last few days I’ve been dead. tired. I keep feeling like I’m getting cramps like I’m getting my period but nothing comes. I go back to the clinic on Tuesday but they’re probably gonna do the same thing as last time. Could I be pregnant?

Also I’m not sure if this is related but when my boyfriend lays on my stomach I feel a really odd pressure around my pelvis