Filed my 2018 taxes in 2020. Since they were late I had to mail in my returns. I'm filing Married Separate for 2018 and 2019? The state has already completed?

But, everytime I check irs.gov get my payment I can't get any info on stimulus payment.  

#1.  How can I find out that they've received return that I mailed on 4.21.2020?  And when I may get my payment?  I've filed with my husband forever but decided to do it separate going forward.  

Any help is more than appreciated.