Background Check + Offer Letter timeline???

Hi everyone, I applied on the first week of February. This past Friday (April 4th) I got a call from the manager asking me if I was still interested and if I could come for an interview on Sunday (April 6th). I went, we both hit it off really well and she offered me the position and that same day gave me my schedule. I should start the 21st of this month. I got the email for the background check right away and did it on Sunday, checking the status of it, it says complete, but I’m still not yet to receive the offer. I was also texting the manager a bit regarding my availability ( I didn’t think I was going to get hired on the spot and already be given a schedule so I just want to make sure have everything sorted out ) and the last thing I texted her about was needing the Tuesday of the following week off because of a personal matter. She hasn’t replied back and it’s been 2 days, I guess i’m just a very anxious person and I’m really excited for this job, the hours are great and i’m a little scared of getting ghosted. So, I’m just wondering how long it took for anyone working there after their background check to receive their official offer letter? Thanks!