Birth control question

This question is probably dumb af but I haven't been on bc for awhile. So I started the pill less than a month ago I think like 3 weeks and I missed 2 days back to back earlier this week and my friends birthday is today and we are all going to the beach so I didn't want to double up on pills yet because I didn't want to get my period until after I went to the beach so I just started to take them again like normal but I started spotting 2 nights ago so I was thinking this sucks I got my period but it was only there for like a day and it was very light practically just spotting and it was darkish brown and now it's gone. So what I'm wondering is, is this normal? Because I remember when I use to take the pill and I forgot I would get a pretty much get a normal period. I've been feeling sick for the past week also I've had a low grade fever, super fatigued, lower back aches, and was super nauseated last night.