Maybe baby?

So I had my DS back in August, so he’s 7 months as of now.

The other day while I was showering there was a strange discharge. Like old blood that looked like string. Anyways I wasn’t bleeding etc etc. but I didn’t think anything of it. Since yesterday and this morning, I’ve been wiping old blood. It’s not bright red or anything just dingy brown.

So I checked glow. I apparently ovulates last week, and yes me and my husband had sex around ovulation time. But I’ve only had 3 pp periods since I gave birth, and they haven’t been on any type of schedule. First one was 5 days. The next was 22 days late and lasted 4 days. The next one (which was the last) was 19 days late and lasted for 7 days. (Horrible cramps too)

I say all that to ask this. Is there a way I’m pregnant. With my period being off I assume my ovulation is off as well. I can’t test for another week anyways, as my supposed period is due in 10 days.

Has anyone else ever had a situation like this and were pregnant? TIA