TTC After Mirena

We are TTC baby 2. I got my Mirena out late June after having it in for six years. I had my period at my normal cycle time shortly after. I've usually had normal length cycles and short cycles. Now I am five days late and got another negative pregnancy test. I know sometimes it can take awhile to get back to normal and it's rare to conceive so quickly. I'm just frustrated since my body is giving me mixed symptoms and I can't track my cycle. I have had some mild cramping but I've been emotional, tired, and had mild nausea. My normal PMS symptoms haven't been there. I know we just started trying but my body is driving me nuts. Any insight from other ladies that have had similar issues? How long until you were able to track your cycle?