Is it signs or just in my head?

So I honestly need some feedback from anyone. At 4dpo I experienced a pain in my lower center abdomen. It was sharp, stabbing and made it hard to breathe then passed. At 5dpo I experienced it again in around the same spot, but not the exact same.

I've been nauseous for the past 3 days (thought they were trapped gas bubbles, but even after burping the nausea remains) and experiencing minor mood swings (I also have a mood disorder, but I've strangely found myself more in control this past week).

I'm also very sleepy (which is kinda normal if I don't sleep well, but I've been getting very solid sleep and I'm still about to pass out doing the smallest things) I also had the strangest craving for pickles, specifically garlic pickles and cheesecake last night. Freaking pickles have never tasted so good as they did before I went to bed lol.

I'm 7dpo at the moment having to go to the bathroom almost every hour since I woke up at 7am. I haven't even finished a 16 oz bottle of water.

I took a pregnancy test and it came back negative and I don't have a UTI.

Help!

My husband is super excited about us possibly being pregnant, but we don't want to get our hopes up.

I already told him about the negative test this morning and he was a bit bummed out, but he encouraged me to test again later and I think he's looking forward to me not reaching into the tampon drawer in the next week.

He's such a great guy and he can't wait to be a daddy. He's already read up on how to change diapers and properly wash babies as well as how to feed and hold them. He's so stinking cute to watch and I just want it to happen for us so bad. Which is why I worry it's all in head.

Please - any input or advice would be lovely.