Late period

I am ttc baby number 2. Last period was Dec 24, I was tracking with opk and kept getting negatives. On CD23+24 I’ve reached two positives.

I am still breast feeding my 13 month old however I have been getting my period regularly every month around the same time

I am now 7 days late and 9 day’s past ovulation

When I was 4 days late I took a dollar store test and got a negative

On day 6 I took digital test it just said not pregnant.. it didn’t have lines

I am so frustrated I’m scared to check and have my hopes crushed.

I still have no period... what test should I get next and when should I take it

Please someone tell me if this happened to you