Trying to Conceive!

So me and my partner of 3 years have been trying for the past year to conceive but we have not been successful as of yet☹️. I’m 21 years of age, and for the past two years I’ve been having irregular periods but for the past couple of months I have been spotting blood and I’m not sure if this is my body’s way of having a period or just clearing out old blood. Also, for the last couple of days or so I’ve been experiencing cramps in my stomach is there anyone that’s been through this or knows of someone going through this and if you can give me some advice. Any advice would be appreciated and any tips on TTC because seeing a negative pregnancy test is soul destroying😔