Spotting

So this month I thought I started my period but it was really light like practically nothing so I was a little worried it was on and off for about four days then stopped so I thought my period had came and went, but today (day 5 of suspected period) it started flowing like normal. So I'm assuming that before I didn't have my period and that I was just spotting. I was worried until my bff had told me her, her sister, and her aunt all have the same thing from time to time. I've been on estrogenless bc for a year now so this has kinda been "normalish" for about a year. I am goin to the dr. Because I have to get a papsmear anyway so I'll talk to them about it, but for now can I get some peice of mind here? Tell me if its normal and I should be fine? Thanks