Feeling so sad

I think I'm done ttc. Haven't received my period in 16 days, instead of a period- I spotted for five days and I thought it was af so I used a tampon and there was no blood flow. Neg tests and to add insult to injury no LH surge on the opk's. I have symptoms of pregnancy but thinking its all in my head. I'm very confused sad and think I'm just gonna stop trying.