You have to search for a kind 9735 that has you pubkey as `p` tag. You can use something like playground.nostr.com
The main problem will be to find a relay that has this historical data. 

 nostr:nevent1qqsdljs8z6fh4tezrdr6tjdze03vcuamd7ztzsmdu6a8n5t9na85vvcpz3mhxw309akx7cmpd35x7um58g6rsd3e9upzpaxm2fctmxgmz7l2reksxh69mm3e9yvu99r5hwkpqdpdyg78fcxsqvzqqqqqqyhdtatw 

 Alternatively, you could look through the invoice log of your lightning client. It might be better at keeping historical data than nostr relays.

Look for the first invoice that is paid and has "kind":9734 in its description. 

 👍