Please help with some advice

I’ve been so so so stressed.

I used a condom & he didn’t cum but I’m so worried I could be pregnant (early October).

I don’t know what to do, I’ve bled since however my last periods have been very abnormal to my normal ones. Usually they’re super heavy and fill up at least 3 big pads a day, lasting 3-5 days.

Although I know I’ve bled, I’m still worried as my bleeding aren’t nearly as heavy & long as they usually are, it isn’t even 1/4 the amount. If anything it’s only more SPOTTING when I wipe.

It’s been very light in October & November. I really don’t remember December’s, I think it was light too.

I bled twice in January:

The first bleeding filled up half of one of my usual pads, and lasted 1 day. I spotted the days before and it was really sticky brown blood. The day after my bleeding I wouldn’t dirty the pad, only when I wiped did I see red/pink blood.

The second bleeding (which came one week after the last), barely filled up the pad. I mean it was like a little patch in the middle that just got through to the other side. It lasted one day, with brown spotting before and after that day, only appearing when I wipe.

Now it’s February and my period came 2 weeks early, with just as little blood.

I’ve had a negative blood test in jan, but I swear I keep feeling stuff in my stomach. Is it gas and I’m just really aware of everything and thinking of the worst? Sometimes it’s quite strong and happens in my lower abdomen. But then again I think it’s most likely gas

I really really don’t mean to sound silly :( I know how dumb it sounds but I can’t help but be paranoid