I am missing my period a lot and I'm a 13 year old virgin :(

[TigerKu]

I was 12 when I had my first period (beginning of 2016) And after my first one, I ended up missing my period for five months after the first one, and after my second one came, (which was 2 months ago) I've already missed 2 months, I have gained a little bit of weight, and I've read that a gain and loss in weight can cause a irregular period.  My number one fear is getting pregnant at a young age, (like for example 13 like I am right now)
I am still a virgin, and I do take baths often, and i've also read that water can sometimes (rarely) for some reason have sperm in it, if its not clean.  And honestly my tap water isn't the cleanest, (ITS NOT GROSS DONT WORRY IT JUST DOESN'T TASTE THAT GREAT!) and i dont really understand how i could get pregnant from it.  
I have really bad anxiety when I am late on my period and i always think the worst situation (Like, i'll think i got pregnant)
I have still missed my second period and its been 2 months, if you know whats going on please help

[remar]

It's not uncommon for girls your age to go through this. It might take months or even a few years for your period to become regular.
Have you talked to your mom about this? If not, it might be a good idea so she can take you to a Dr. They will most likely tell you the same thing I am.
You might be able to get your periods on time if you get on birth control pills. They're not just for protection against pregnancy. A lot of girls who are virgins take the pill so they will have regular periods.
No, you can't get pregnant from bath water. I would recommend cleaning the tub before you take a bath so you'll have a nice clean tub.You can spray it down with most spray cleaners, let it sit for awhile and then rinse the tub really well.
I hope this eases your mind. Give yourself a little more time and if you don't get your period do talk to your mom about all of this so you can see a Dr and decide if you should give your body more time or if your Dr will want to do something now.

[TigerKu]

Thank you so much this really helped me out, and I'm really glad that someone responded, I am still a bit worried, but I'll wait just a little bit before I tell my mom, and I'll wait to see if my period will come.