trying to conceive

Darian • I am 23 years old, I have a 15 month old son, and I am married!! ❤️
So I have all the symptoms that I had with my 15 month old son when I was pregnant. Here are the symptoms:
Bloated
Gassy
Heartburn
10 days late on my period
Bleeding gums( which I haven't had since I was pregnant) 
Aching teeth
Lots of discharge
I have taken about five tests and they all came out negative... we are going to a clinic next week to get a blood test. But what do y'all think it could be? My mom thinks my hcg levels might be to low right now...