What do you think?

Me and my SO are TTC #1 for him #2 for me. And we've done my whole fertile window plus some and in scared to take a test because everyone negative . this time I haven't took a bpt I'm trying to hold off. But I've been having back pain/ burping, and a small increase in appetite but nothing dramatic . i even pelvic check and it has me sceptical... Hmm you think I could be pregnant ?