Worried

So I have PCOS and the longest my cycle has ever been since trying to conceive is 60 days (I know, it’s way long). Well I’m now on cycle day 70, two negative urine tests, and having pregnancy symptoms. Usually I have difficulty falling asleep at night but lately I lay down and I’m asleep within less than 5 minutes. I’ve been feeling sick and nauseous every day for like a week now and my appetite has changed a lot. I’m concerned though that it could be something terrible. Any words of advice or encouragement?